Step 2 of 4 · ProjectsBy tax area

292 open source projects for VAT and indirect tax.

Every project on the list whose tax area includes VAT & indirect, grouped by kind. Entries without a warning come first in each group; the labels mark what to check.

292 projects234 maintained176 on the map58 jurisdictions + globalFacts checked 6 Oct 2026

Tax engines

11 projects

Rules-as-code that compute liabilities, returns and reforms.

OpenFisca France indirect taxationOpenFisca model of French indirect taxes.Tax engineFR

openscheduleSouth African SARS customs tariff schedule tooling for versioned, auditable rule sets.Tax engineZA

tariff-engineRule-based HS classification engine (AI at build time, deterministic at runtime) covering 20 chapters; on npm.Tax engineGlobal

UK VATLabToolkit for modelling UK VAT policy.Tax engineUKLicence unknown

AfCFTA_Rules_of_OriginRust prototype encoding the AfCFTA rules of origin (Article 5) as rules-as-data.Tax engineGlobalDemo

borderlogix-hs-engineFastAPI implementing WCO GIR 1 to 6 for Papua New Guinea customs classification with duty and SAD mapping.Tax enginePGDemoNeeds a paid serviceLicence unknown

canataxLightweight Canadian sales and income tax calculator.Tax engineCAInactive since 2025

customs-duty-calculator (ShahinHasanov90)Customs duty and tax engine (ad valorem, specific, compound and FTA rates) as a .NET 8 API.Tax engineGlobalDemo

customs-valuation-engineWCO six-method customs valuation engine in TypeScript with Incoterm adjustments and an audit trail.Tax engineGlobalDemoLicence unknown

fiscalize (grunt-it)Engine for EU national e-invoicing and fiscal clearance on EN 16931 with country adapters; a Slovenian pilot.Tax engineSI · EUDemoLicence unknown

Scsl.Math.CustomsCode library for customs valuation and duty and VAT computation under Philippine regulations.Tax enginePHInactive since 2025

Calculators

12 projects

Small tools that compute one tax for one country.

bdtariffPython package for Bangladesh customs tariff lookup and import duty calculation, on PyPI as bdtariff.CalculatorBD

import_tax_calculatorDjango web calculator of Ukrainian import taxes on parcels.CalculatorUAFor individual taxpayers

Inflop.VatSharp.NET library for EU VAT calculation under Directive 2006/112/EC with three calculation methods.CalculatorEU

nepal-hs-code-finderNepal Customs Tariff 2026/27 search with a duty calculator, an AI assistant and trade statistics.CalculatorNPLicence unknown

nepal-knitwear-sourcing-toolsRules-of-origin checker, Nepal-to-India duty calculator and duty dataset for knitwear importers.CalculatorNP · IN

Tax-Calculator (jdspr)React calculator for Belgian self-employed: INASTI contributions, income tax (IPP), VAT and expenses.CalculatorBEFor individual taxpayersLicence unknown

TaxGyaanIndian tax calculators, a GST invoice generator and EMI and SIP tools, as a React web app.CalculatorINFor individual taxpayersLicence unknown

vat-penalty-calc (Korea)Korean VAT penalty tax (gasanse) calculator.CalculatorKRFor individual taxpayersLicence unknown

cptpp-projectOCaml CPTPP rules of origin and tariff calculator, written as an educational project.CalculatorGlobalDemo

Customs-CalculatorBrowser app with an Express API estimating Philippine import costs: HS search, duty and VAT; unfinished.CalculatorPHDemo

my-next-filingBrowser app for Indian freelancers: income tax estimate under presumptive rules and a dated filing plan.CalculatorINDemoFor individual taxpayers

UK Trade Tariff duty calculatorThe Online Trade Tariff's Rails duty calculator, archived in June 2025.CalculatorUKArchived

Agent skills

2 projects

Packaged tax expertise an AI agent can follow, step by cited step.

claude-trade-skillsAgent skills for Indian export compliance: ICEGATE, LUT, shipping bill errors, EORI and Incoterms.Agent skillIN

tax-and-finance (Israel)AI agent skills for Israeli tax, invoicing and VAT.Agent skillIL

MCP

16 projects

Open connectors and protocols between agents and legislation, case law and ledgers.

elster-mcp-serverMCP server for the German ELSTER portal: submits VAT pre-returns and prepares income tax filings.MCPDE

mcp-htsMCP server for US tariff rates from the USITC schedule, through a free gateway or a local stdio server.MCPUS

tariff-everywhereLocal US HTS lookup in SQLite with a CLI and an MCP server.MCPUSHippocratic License 3.0

tariff-resolverMCP server for US import duty research from bundled USITC data: Chapter 99, MPF and HMF fees, landed cost.MCPUS

UK Trade Tariff MCP serverMCP server from the UK tariff team: commodity-code lookup on the Online Trade Tariff as tools for AI clients.MCPUK

zatca-mcpMCP server that lets AI agents create Saudi ZATCA-compliant e-invoices.MCPSA

agenttax-mcpMCP server that tracks US sales-tax obligations for paid MCP tools and AI agents.MCPUSNeeds a paid service

customs-mcp-server (yak33)Fourteen customs and trade MCP tools (declarations, tariff, dual-use screening, parsing); backend not open.MCPCNNeeds a paid service

douanecode-mcpMCP server for HS, NC8 and TARIC code search through douanecode.fr; needs a Pro API key.MCPFR · EUNeeds a paid service

FacturaHub MCPMCP server for invoicing, expenses and tax declarations through FacturaHub's API; e-invoicing for Panama.MCPES · MX · GlobalNeeds a paid service

hs-code-classifier-mcp-serverMCP server that classifies products to HS codes through the HSPing API; needs a key with tiered pricing.MCPGlobalNeeds a paid service

InvoiceXML MCPMCP server for the InvoiceXML API: Factur-X, ZUGFeRD, XRechnung, UBL, CII and Peppol BIS invoices.MCPEU · DE · FRNeeds a paid service

Norman MCP ServerMCP server that connects AI assistants to Norman's bookkeeping and tax service for German businesses.MCPDENeeds a paid serviceFor individual taxpayers

openswissdataMCP server and signed datasets of the Swiss customs tariff (TARES), FINMA lists and NOGA crosswalks; hosted.MCPCHNeeds a paid serviceLicence unknown

vatnode MCPMCP server to validate EU VAT numbers and look up VAT rates, with offline checks.MCPEUNeeds a paid service

vies-mcp-serverMCP server that validates EU VAT numbers through the VIES service.MCPEUInactive since 2025Licence unknown

Plugins

3 projects

Bundles of skills, tools and agents, installable in one go.

NL Tax Agent SkillsPlugin that turns Dutch tax documents into workpacks for manual entry in Mijn Belastingdienst.PluginNLFor individual taxpayers

shinkokuPlugin that automates Japan's kakutei shinkoku: bookkeeping, tax calculation and e-Tax form filling.PluginJPFor individual taxpayers

FacturaHub pluginClaude plugin with invoicing, expense and e-invoicing tools and skills for Spain, Mexico, Colombia and Panama.PluginES · MX · GlobalNeeds a paid service

APIs

139 projects

Validation, rates, filings and registries you can call directly.

aade-mydataPHP client for Greece's AADE myDATA invoicing API: send, cancel and retrieve invoices.APIGR

BelgiumVatChecker.NET Web API that validates Belgian and EU VAT numbers using the VIES service.APIBE · EU

BrevJVM library to write and read Peppol BIS Billing 3.0 invoices and credit notes, with Norwegian identifiers.APINO · EU

cbam-apiGo API on the EU Carbon Border Adjustment Mechanism (CBAM) data model.APIEU

chinaport-data-signatureSigns China E-Port customs messages (CEB, 179 data) for cross-border e-commerce declarations.APICN

commerceguys/taxPHP tax library for commerce applications: tax types, zones and rates.APIGlobal

customs-api (Maldives)PHP SDK for the Maldives Customs Service API: trader lookup.APIMV

customs-domainPHP domain logic for commodity code validation, UK Trade Tariff mapping and compliance rules.APIUK

Dutch Peppol Authority validationSchematron and XSL validation artefacts for SI-UBL and NLCIUS e-invoices from the Dutch Peppol Authority.APINL

e-factura-goGo client for Romania's ANAF e-Factura and e-Transport APIs, with a UBL builder and a CLI.APIRO

einvoice_atSelf-hosted Austrian platform to create, validate and convert ebInterface and Peppol BIS Billing invoices.APIAT

einvoicing (JavaScript)JavaScript library to create and parse EN 16931 e-invoices and popular extensions.APIEU

eInvoicing-EN16931Validation artefacts for EN 16931, the European e-invoicing standard.APIEU

ESJ (EN 16931 Semantic JSON)JSON binding of the EN 16931 invoice model, with a Java library, CLI, validation and UBL/CII conversion.APIEU · DE

eu-vat-evidence.NET library for EU VAT number validation and compliance evidence, in two NuGet packages.APIEU

factur-xPython library for Factur-X, the e-invoicing standard for France and Germany.APIEU · FR · DE

Facturae-PHPPHP library to create, sign and send Spanish Facturae e-invoices without other dependencies.APIES

fatoorityRust toolkit for Saudi ZATCA Phase 1 and Phase 2 e-invoicing.APISA

fattura-elettronicaPHP library that generates Italian e-invoices in the XML format of the Agenzia delle Entrate.APIIT

FatturaElettronica.NETItalian electronic invoicing for businesses and public administration, in .NET.APIIT

faturaPHP library for Türkiye's GİB e-Arşiv portal: e-invoices, e-SMM and e-Müstahsil receipts.APITR

go-financeGo library with exchange rates, VAT number validation and IBAN/BIC conversion.APIEU

GOBLGo library and schemas for electronic business documents, especially invoices.APIGlobal · EU

gobl.es.facturaeConverts GOBL documents into Spain's FacturaE e-invoice format.APIES

gobl.es.verifactuConverts GOBL documents into VeriFactu records and sends them to Spain's tax agency.APIES

HMRC Advance Tariff Rulings serviceHMRC's Advance Tariff Rulings service: application frontend, case backend, rulings search, case manager.APIUK

HMRC CDS FinancialsHMRC's CDS financial services: duty deferment statements, cash and guarantee accounts.APIUK

HMRC Customs Declaration Service APIsHMRC's Customs Declaration Service APIs: submit, amend and cancel declarations, upload documents.APIUK

HMRC Customs Exports Declaration ServiceHMRC's Customs Exports Declaration Service: trader frontend, declaration backend and the movements service.APIUK

HMRC customs inventory linking APIsHMRC's inventory linking APIs for import declarations and for export consignment consolidation and movement.APIUK

HMRC EORI servicesHMRC's EORI services: an API that checks a GB EORI number and returns trader details, with its backend.APIUK

HMRC EU VAT refundsHMRC service for EU VAT refund claims, started in 2026.APIUK

HMRC financial transactions (VAT)Service returning MTD VAT liabilities, payments and late-payment penalty details, with direct debit checks.APIUK

HMRC Import Control System (ICS2)HMRC's import control services: entry summary declaration store, ICS2 WSDL schemas, safety and security guide.APIUK

HMRC New Computerised Transit System (NCTS)HMRC's transit services: traders API, NCTS validator and converter, movement store, documents, guarantees.APIUK

HMRC VAT APIHMRC's Making Tax Digital VAT API: obligations, returns, payments, liabilities and penalties.APIUK

HMRC VAT repayment trackerService where businesses track the progress of a VAT repayment: frontend and backend.APIUK

hs-code-lookupJavaScript library that parses, validates and looks up HS codes with MFN duty rates for US, EU, UK and China.APIUS · EU · UK · CN

HSN-Code-PackageZero-dependency HSN and SAC code lookup and India GST toolkit, on npm as hsn-code-package.APIIN

hstc-apiFree REST API for searching the Vietnamese HS code explanatory notes.APIVN

ibericode/vatPHP library for European VAT: rates, VAT number validation and country checks.APIEU

invoicesuitePHP library to create, read and validate XRechnung, ZUGFeRD and Factur-X e-invoices.APIDE · EU

kaltblutJava library for handling ZUGFeRD e-invoices.APIEU · DE

KSeF official clients (C#, Java)Official C# and Java clients for KSeF, Poland's national e-invoice system, from the Ministry of Finance.APIPL

ksef-apiIntegration guide for KSeF 2.0, Poland's national e-invoicing system.APIPL

ksef-php-clientPHP client for KSeF, Poland's national e-invoicing API.APIPL

ksef4jJava client for Poland's KSeF 2.0 e-invoice API, with fluent builders and Spring Boot autoconfiguration.APIPL

ksefujValidator for Polish KSeF FA(3) e-invoices: XSD, business rules and tax maths, as web app, npm and CLI.APIPL

LaravelVerifactuLaravel package that records invoices under Spain's VeriFactu system.APIES

Mews.Fiscalizations.NET libraries that report e-invoices and receipts to six countries' fiscalisation systems, by a hotel vendor.APIAT · DE · ES · HU · IT · SE

mustangprojectJava library, validator and tool for e-invoices: Factur-X/ZUGFeRD, XRechnung and UN/CEFACT CII.APIEU · DE

mydataPython client and CLI for Greece's myDATA tax platform, with data models and an invoice workflow helper.APIGR

myinvoisUnofficial TypeScript SDK for Malaysia's MyInvois e-invoicing API, with UBL 2.1 and digital signing.APIMY

NAV eRECEIPTPublic repository of Hungary's e-receipt (eNyugta) cash-register system: developer docs, XSDs and examples.APIHULicence unknown

NAV eVATPublic repository of Hungary's eVAT system: M2M interface docs, schemas and example XML for the VAT return.APIHULicence unknown

NAV Online InvoicePublic repository of Hungary's Online Invoice real-time reporting system: schemas, docs and examples.APIHU

nfe (Java)Java library for Brazil's electronic invoice (Nota Fiscal Eletrônica).APIBR

NFeWizardNode.js library for the SEFAZ web services behind Brazil's electronic invoice (NF-e).APIBR

node-sales-taxNode.js sales tax and VAT calculator with offline rates and an optional VAT number check.APIGlobal

open-logistics-toolsHS code validation and Bangladesh customs duty calculation utilities, published on npm.APIBD · Global

OpenXRechnungToolboxDesktop toolbox to view and validate XRechnung and other EN 16931 e-invoices.APIDE

org.coderic.ws.sunatJava JAXB bindings of UBL schemas for integrating with Peru's SUNAT electronic invoice web services.APIPE

Oxalis-NGOxalis Next Generation, open-source implementation of the OpenPeppol AS4 profile for access points.APIEU · NO

Peppol BIS Billing 3.0Specification and validation rules for Peppol BIS Billing 3.0 e-invoices, from OpenPeppol.APIEULicence unknown

peppol-billingTypeScript library that generates and parses Peppol BIS Billing 3.0 (UBL 2.1) invoices and credit notes.APIBE · EU

peppol-bis-billing-3-generatorJava code that generates Peppol BIS Billing 3 invoice XML.APINO · EU

peppol-toolkitTypeScript toolkit to generate and read Peppol UBL e-invoices.APIEU

phase4AS4 client and server library with built-in Peppol and CEF eDelivery support.APIEU · Global

phive-rulesE-invoice validation rules for the phive engine, covering many countries.APIGlobalLicence unknown

phoss APphoss AP, an open-source Peppol Access Point server by the author of phase4 and phive.APIEU

phoss SMPphoss SMP, a Peppol and OASIS BDXR service metadata publisher server.APIEU

php-zatca-xmlPHP library for ZATCA Fatoora e-invoices: certificates, XML, signing, QR codes and API submission.APISA

PyNFePython library for the web services of Brazil's electronic invoice (NF-e).APIBR

python-stdnumParse and validate VAT, TIN and company numbers for dozens of countries.APIGlobal

siiLibrary for SII, the Spanish tax agency's immediate VAT reporting system.APIES

Skatteetaten mva-meldingenImplementation guide and validation material for the Norwegian VAT return (mva-melding) API.APINO

Skattestyrelsen RSU B2B sample clientsDanish Tax Agency sample Java and .NET clients that submit VAT returns and fetch periods and receipts.APIDKLicence unknown

StampbenchTypeScript library and CLI to validate, repair and generate XRechnung and EN 16931 e-invoices.APIDE · EU

tax-idsRust crate that validates VAT and GST numbers in the EU, UK, Switzerland and Norway.APIEU · UK · CH · NO

ubl-invoicePHP library to read and create UBL electronic invoices.APIGlobal

ubl-peppolPHP library that builds UBL 2.1 e-invoices for Peppol BIS Billing 3.0.APIEU · NL · BE

UK Online Trade TariffThe UK Online Trade Tariff: API, website, admin tool and electronic tariff file for codes, duties and quotas.APIUK

ura-efris-php-sdkPHP SDK for the Uganda Revenue Authority's EFRIS e-receipting and e-invoicing API.APIUG

valvatRuby gem that validates EU and UK VAT numbers, standalone or as an ActiveModel validator.APIEU · UK

vat (adaptive)Cloudflare Worker that validates EU VAT numbers via the VIES SOAP service and returns JSON.APIEU

vat-calculatorPHP library that applies EU VAT rates and MOSS rules and validates VAT numbers.APIEU

VATcomplyRust API server for VAT number validation, ECB exchange rates, VAT rates and IP geolocation.APIEU

VATValidationVAT number validator with GUI, CLI and REST API for German, EU, UK and Swiss checks.APIDE · EU · UK · CH

VeriFactuSends invoicing records to Spain's tax agency (AEAT) under the VeriFactu rules.APIES

Verifactu-PHPPHP library for VERI*FACTU, the Spanish tax agency's invoice reporting system.APIES

vies-checkerTypeScript validator for EU VAT numbers using the European Commission's VIES service.APIEU

vies-client (LGx0)Zero-dependency Java client for validating EU VAT numbers through the VIES REST API.APIEU

vies-dotnet.NET library that validates EU VAT numbers through the European Commission's VIES service.APIEU

XRechnung validator configurationThe official XRechnung and EN 16931 validation scenarios for the KoSIT validator.APIDE · EU

XRechnung-for-DelphiXRechnung, ZUGFeRD and Peppol BIS Billing library for Delphi and FreePascal.APIDE

ZATCA (Salla)PHP package for Saudi ZATCA e-invoicing, phases 1 and 2: CSR, invoice signing and QR codes.APISA

zatca-kitTypeScript toolkit for Saudi ZATCA e-invoicing: CSR, QR codes, XAdES signing and API calls.APISA

zimra-fdmsTypeScript SDK for ZIMRA's fiscalisation system: device registration, mTLS, receipt signing, offline queue.APIZW

AvaTax REST v2 PHP SDKPHP SDK for the AvaTax REST v2 API, a hosted tax calculation service.APIUSNeeds a paid service

cakephp-vat-number-checkCakePHP plugin that normalises a VAT number and checks whether it is valid.APIEUInactive since 2019

checkvatScala library that checks whether an EU VAT number is valid, following the VIES specification.APIEUArchivedLicence unknown

e_invoice_qrcode_readerFlutter app that decodes and shows the QR code on Saudi ZATCA e-invoices.APISAArchivedLicence unknown

e-invoice-tsTypeScript SDK for the e-invoice.be Peppol API: create and manage e-invoice documents from server code.APIEUNeeds a paid service

e-invoice-validator (easybill)Validation service for UBL and CII e-invoices against EN 16931, XRechnung, Peppol BIS and Factur-X rules.APIEU · DEInactive since 2025

efaturaCreates invoices through Türkiye's e-Arşiv system.APITRInactive since 2025

egypt-eta-tax-apiLaravel helper that hashes and submits e-receipts to the Egyptian Tax Authority's pre-production API.APIEGInactive since 2025

einvoicing (PHP)PHP library to read and create EN 16931 European e-invoices as UBL; CII is on the roadmap.APIEUInactive since 2025

eori (PHP)PHP EORI number validator.APIEUInactive since 2024

estonian_e_invoicePython package that generates e-invoices in Estonian e-invoice standards.APIEEInactive since 2020

Factur-X LibreOffice extensionLibreOffice Calc extension that generates Factur-X PDF invoices.APIEU · FR · DEArchived

hscode (Go)Go package embedding the HS nomenclature with validation, lookup and search; data under PDDL.APIGlobalInactive since 2025

hyperway.NET Core Peppol Access Point implementation, last changed in 2018.APIEUInactive since 2018Licence unknown

kra-etims-api-integrationNode.js implementation of the KRA eTIMS API integration.APIKEInactive since 2025Licence unknown

laravel-zatcaLaravel package that generates and signs the QR code for ZATCA e-invoices in Saudi Arabia.APISAInactive since 2021

laravel-zatca-phase2Laravel package for Saudi Arabia's ZATCA Phase 2 e-invoicing.APISAInactive since 2025

m2-vatfallbackMagento 2 module that validates VAT numbers by API, with an offline regex fallback for VIES outages.APIEU · UKArchived

myinvois-gatewayREST gateway that converts JSON to UBL, signs and submits documents to Malaysia's MyInvois clearance API.APIMYInactive since 2025

NAV Online Cash Register logfilePublic repository of the service that downloads Hungarian online cash-register log files.APIHUInactive since 2023

NIP24 PHP clientPHP client for NIP24: validates Polish NIP, REGON and KRS numbers and EU VAT IDs.APIPL · EUNeeds a paid service

node-unipassNode.js client for the Korea Customs Service's Unipass clearance tracking.APIKRInactive since 2025

NormAPI clientTypeScript client for NormAPI: validate and generate XRechnung and ZUGFeRD e-invoices without local Java.APIDENeeds a paid service

openadeTypeScript library for Italian electronic receipts (PEM/PEL) and e-invoices to the Revenue Agency's SDI, v0.1.APIITDemo

OxalisOxalis, the open-source Peppol Access Point originally built for the Norwegian government, now frozen.APIEU · NOArchived

peppol-bis-billing-validator (easybill)Docker service that validates XML invoices against the Peppol BIS Billing 3.0 schematron rules.APIEUInactive since 2024

python-a38Python library to create, parse, validate and render Italian electronic invoices (Fattura Elettronica).APIITInactive since 2024

Stanza VAT Validator (C#).NET client for a hosted EU and UK VAT number validator and rate lookup.APIEU · UKNeeds a paid service

TaxPoynt eInvoiceMiddleware meant to connect financial software to e-invoicing with Nigeria's FIRS; a proof of concept so far.APINGInactive since 2025DemoLicence unknown

UniRate .NET client.NET client for the UniRate API: currency exchange rates and VAT rates by country.APIGlobalNeeds a paid service

vat (Danny van Kooten)Go package that validates EU VAT numbers and looks up VAT rates.APIEUInactive since 2023

viesPHP component that checks EU VAT numbers against the European Commission's VIES service.APIEUInactive since 2024

vies-vat-validation-php-sdk-restPHP SDK for validating VAT numbers through the European Commission's VIES REST service.APIEUInactive since 2023

vies-vat-validation-php-sdk-soapPHP SDK for validating VAT numbers through the European Commission's VIES SOAP service.APIEUInactive since 2023

ZATCA (Android)Android library that generates the ZATCA (Fatoora) e-invoice QR code for POS apps.APISAInactive since 2022Licence unknown

zatca (Axenda)Node.js package that generates the ZATCA (Fatoora) e-invoice QR code for Saudi Arabia.APISAInactive since 2023

zatca (Mrsool)Ruby library to create ZATCA e-invoices and QR codes, supporting Phase 1 and Phase 2.APISAInactive since 2023

zatca-qrPHP implementation of Saudi ZATCA e-invoicing requirements, with QR codes and key and CSR generation.APISAInactive since 2024

zatca-sdk-goGo package that encodes the ZATCA (Fatoora) e-invoice QR code for Saudi Arabia.APISAInactive since 2021

Zatca.Net.NET library that generates the ZATCA e-invoice QR code as hex, base64 or image.APISAInactive since 2022

zoll-api (bund.dev)OpenAPI specification and Python client for German customs (Zoll) import duty and exchange rate queries.APIDEInactive since 2022Licence unknown

Automations

73 projects

Reusable workflows for provisions, reconciliations and compliance runs.

amazon-state-sales-and-tax-summaryTurns marketplace order exports into state-by-state sales and tax totals for US sales-tax returns.AutomationUS

ca-erpnext-zraZRA Smart Invoice VSDC integration for Frappe and ERPNext.AutomationZM

caseflowTariff classification with legal reasoning for Nigeria's ECOWAS common external tariff and the US HTS.AutomationNG · USLicence unknown

CFO StackBeancount accounting run through Claude Code, with jurisdiction packs for Canada, the US, Taiwan and China.AutomationCA · US · TW · CNFor individual taxpayers

ClasificodeColombian DIAN tariff classification system: RGI rules, pgvector search, LLM reranking and a DIAN scraper.AutomationCOLicence unknown

conciliador_nfeReconciles Brazilian e-invoices from the tax authority export against ERP entries and lists the gaps.AutomationBR

DocumentAnalyserAPIFastAPI service that validates CBAM spreadsheet rows: EORI numbers, CN codes, ISO country codes and dates.AutomationEU

DouaneXtractSelf-hosted full-text search over 3,007 Tunisian customs documents: rulings, letters, WCO decisions.AutomationTNLicence unknown

EMR (eRačuni)Browser extension that downloads incoming eRačuni from Croatia's MIKROeRAČUN portal into monthly batches.AutomationHR

eu_einvoice (ERPNext)ERPNext app that creates and imports UN/CEFACT CII e-invoices, including XRechnung.AutomationEU · DE

eu.idempiere.intrastatiDempiere plugin that generates per-country Intrastat XML declarations.AutomationEULicence unknown

hs-code-lookup (AccioWork)HTML tool to find 6-digit HS and 10-digit HTS codes for 15 or more product categories, with 2026 rates.AutomationUS

hscode-worksheet-extensionChrome extension that generates US HTS codes and customs worksheets offline for eBay exporters; Japanese.AutomationUS · JPFor individual taxpayersLicence unknown

hts (Analytics Everywhere Lab)Multi-agent AI identifier for Canadian tariff codes from item descriptions, with a local web UI; research.AutomationCALicence unknown

india-complianceERPNext app for Indian tax compliance, including GST.AutomationIN

Kenya Compliance (navari)ERPNext app that integrates with KRA eTIMS through the Online Sales Control Unit.AutomationKE

KSA ComplianceFrappe app for Saudi ZATCA e-invoicing, Phase 1 and 2, for ERPNext.AutomationSA

KSeF PDF generatorOfficial TypeScript generator of the PDF visualisation of a KSeF e-invoice.AutomationPL

n8n-nodes-zatca-toolsn8n nodes that issue signed, reported ZATCA tax invoices and credit and debit notes from any workflow.AutomationSA

national-trade-forensicsPython pipeline flagging unit-price outliers (MAD z-scores) and Benford's-law anomalies in trade statistics.AutomationGlobal

nomenclatorAI HS nomenclature toolkit: BM25 and semantic retrieval with DSPy programs for classification and reasoning.AutomationGlobal

OCA account-fiscal-rule (Odoo)Odoo Community modules for tax and fiscal rules in accounting.AutomationGlobal

OCA intrastat-extrastatOdoo modules for Intrastat declarations and product HS codes (product_harmonized_system).AutomationEU

OCA l10n-belgium (Odoo)Odoo localisation for Belgium: MIS Builder templates for the VAT declaration, P&L and balance sheet.AutomationBE

OCA l10n-italy (Odoo)Odoo modules for Italian tax: SdI e-invoicing, VAT registers and settlement, withholding tax, stamp duty.AutomationIT

OCA l10n-mexico (Odoo)Odoo modules for Mexican CFDI e-invoicing, SAT catalogues and tax reports.AutomationMX

OCA l10n-netherlands (Odoo)Odoo modules for the Dutch VAT return, the ICP listing and the XAF audit file.AutomationNL

OCA l10n-romania (Odoo)Odoo modules for Romanian VAT on payment, non-deductible VAT and ANAF e-Factura messages.AutomationRO

OCA l10n-spain (Odoo)Odoo modules for Spanish tax: AEAT returns such as 303, 347, 349 and 390, SII, Facturae and VeriFactu.AutomationES

OCA l10n-thailand (Odoo)Odoo modules for Thai VAT and withholding tax, with tax reports and withholding certificates.AutomationTH

OCA l10n-usa (Odoo)Odoo US localisation with a hybrid sales tax engine (local rates first, API fallback), ACH and 1099 modules.AutomationUS

OpenBooksEarly-stage accounting app with EU VAT logic, invoicing and Peppol export.AutomationEU · NL

Pakistan Compliance (ERPNext)ERPNext app that creates and submits sales and POS invoices to Pakistan's FBR digital invoicing system.AutomationPK

Rules-of-Origin-ExtractorNode microservice that extracts rules-of-origin provisions from 450+ trade agreements in an external database.AutomationGlobal

sydonia-toolkitSQL compiler and reference model for ASYCUDA World (SYDONIA) customs databases, read-only, with a sandbox.AutomationGlobal

TaMaTo (Tariff Management Tool)The Department for Business and Trade's Tariff Management Tool for UK import and export tariff data; a copy.AutomationUK

trytond-customsTryton ERP customs module that adds customs duties based on tariff codes; version 8.2.0 released 5 Oct 2026.AutomationEU · Global

Zolltarif-Validator-JavaFXJavaFX tool that validates and categorises 8-digit German customs tariff numbers; distributed as a jar.AutomationDE · EULicence unknown

Accounting AI AgentAI accounting agent for Polish small businesses: bookkeeping, KSeF e-invoices and a tax calendar.AutomationPLNeeds a paid service

afcfta-rules-of-origin-navigatorCLI assessing AfCFTA rules-of-origin eligibility (regional value content) with Python and a local LLM.AutomationGlobalDemoLicence unknown

basic-python-tariff-queryPython library that parses Online Trade Tariff commodity URLs into their key objects; archived.AutomationUKArchivedLicence unknown

cbamtoolsNext.js CBAM cost calculator, HS checker and report preparation, in early development.AutomationEUDemoLicence unknown

Customs-Valuation.NET and Next.js valuation decision support with HS reference data and price evidence for Ethiopian customs.AutomationETNeeds a paid serviceLicence unknown

download-CDS-filesUtility from the UK tariff team for downloading Customs Declaration Service files; archived.AutomationUKArchivedLicence unknown

Egyptian-eInvoicing (mohamedelareeg)Bridge between ERP and POS systems and the Egyptian Tax Authority's e-invoicing platform.AutomationEGInactive since 2024

EInvoicingSignerCommand-line tool that serialises and signs documents before sending them to the Egyptian Tax Authority.AutomationEGInactive since 2024Licence unknown

eori-validatorValidates EU and GB EORI numbers against the EU customs and HMRC registries, as a Next.js app.AutomationEU · UKNeeds a paid serviceLicence unknown

export-declaration-quality-checkerNotebook for HS classification and price anomaly detection on Pakistani garment export declarations.AutomationPKDemo

FacturiaMulti-tenant e-invoicing demo that generates Peppol BIS 3.0 UBL invoices and checks EN 16931 rules.AutomationEUDemo

finance-automation-toolkit (Chezhira)Python scripts for bank, M-Pesa, VAT and intercompany reconciliation, GL checks, payroll and cash forecasts.AutomationTZDemo

harmonized_tariffRuby utility that converts the US Harmonized Tariff Schedule from hts.usitc.gov into JSON, SQL and XML.AutomationUSInactive since 2025

HS-Code-Lookup-for-CustomsHS lookup traced to 177,000 CBP CROSS rulings behind a confidence gate; classifying needs model API keys.AutomationUSDemoNeeds a paid service

HSKNCLI agent prototype classifying products to HS and CN codes with the German Electronic Customs Tariff (EZT).AutomationDEDemo

HTS-ClassifierLangGraph and Claude HTS classifier with a web demo; needs OpenAI, Pinecone and Anthropic keys.AutomationUSDemoNeeds a paid service

Invoice Data ExtractorExtracts invoice fields, including SGST and CGST, from images with OCR and a local LLM.AutomationINInactive since 2025Demo

medusa-infaktMedusa v2 plugin that issues Polish invoices through inFakt and files B2B invoices to KSeF.AutomationPLNeeds a paid service

NetraTaxGraph neural network prototype that scores GST invoice fraud risk and shell-company networks.AutomationINDemoLicence unknown

ott-agentSpike from the UK tariff team: a Bedrock and Claude chat with commodity monitoring over the tariff MCP server.AutomationUKDemoNeeds a paid serviceLicence unknown

peppol-invoice-nextjs-starterNext.js starter that sends Peppol e-invoices through the getpeppr API, with webhook handling and sample UI.AutomationEUArchivedDemoNeeds a paid service

pos_system_frontNext.js point-of-sale front end for Ecuadorian retailers; the SRI e-invoice backend is separate and private.AutomationECArchivedDemoLicence unknown

preference-utilisation-analysisPython tools analysing the utilisation of trade preferences; archived.AutomationUKArchivedLicence unknown

roo-table-extractorExtracts rules-of-origin tables from an EU trade agreement PDF with pdfplumber; one commit.AutomationEUInactive since 2025Licence unknown

rules-of-origin-builder-ukTranslates the UK's rules-of-origin reference documents into a usable data format; archived.AutomationUKArchivedLicence unknown

rules-of-origin-builder-xiScrapes rules-of-origin data for the Northern Ireland and EU tariff; archived.AutomationUK · EUArchivedLicence unknown

sovereign-risk-platformCustoms trade risk scoring platform with twelve risk types for declarations; a portfolio project.AutomationGlobalDemo

taric-geminiAI tariff classification prototype on EU TARIC data; the README documents only its storage layer.AutomationEU · DEDemoNeeds a paid serviceLicence unknown

tariffaiHS6 classification engine: hybrid Qdrant and BM25 search with LangGraph reasoning over WCO schedules.AutomationGlobalNeeds a paid service

TNVED_BOTTelegram bot that picks EAEU TN VED codes only from an official local reference, never inventing a code.AutomationRUNeeds a paid service

trade-classifyLLM HS-code classification with grounding guardrails, a trust boundary and a precision evaluation; a demo.AutomationGlobalDemo

trade-tariff-classification-examplesProof-of-concept tariff classification implementations and examples from the UK tariff team; archived.AutomationUKArchivedDemoLicence unknown

us-hts-classifierLLM agent that classifies to the HTSUS, grounded in schedule notes and CBP CROSS precedent; a prototype.AutomationUSDemo

yapay-zeka-gtip-tespitiTurkish GTIP code decision support: an LLM chooses within the official tariff tree, with 2,355 rulings.AutomationTRArchivedDemo

ZRA-SMARTXWeb app that validates invoices and tax-return files before submission to the Zambia Revenue Authority.AutomationZMDemoLicence unknown

Tax datasets

28 projects

Rates, treaties and statistics, open and versioned.

apparel-hs-codesOpen JSON database of apparel and textile HS codes with MFN duty rates for the US, EU, UK and Australia.Tax datasetUS · EU · UK · AU

cross_rulings_hts_dataset_for_tariffs18,731 US CBP CROSS rulings paired with HTS codes for tariff classification models (the ATLAS paper).Tax datasetUS

DeepCalc tax rate dataOpen tax rate data as JSON and an npm package: US federal income tax, EU VAT, US sales tax for 10 states.Tax datasetUS · EU

EU Tax DatasetEU VAT rates for all 27 member states, compiled from European Commission sources.Tax datasetEUPolyForm Internal Use 1.0.0

EU VAT Rates DataOfficial-source VAT rates for 45 European jurisdictions, machine-readable and checked daily.Tax datasetEU

hmrc-exchange-ratesJSON mirror of HMRC's monthly exchange rates for customs and VAT, 2015 to 2026, updated automatically.Tax datasetUKLicence unknown

hs-code (ronnieaban)Hierarchical HS code classification dataset, one CSV of about 1 MB; no source or year on the card.Tax datasetGlobal

htsdataUS HTS data as JSON, served through jsDelivr.Tax datasetUSLicence unknown

Japanese-English translation of contents HS codesJapan Post's list of 1,111 product names in Japanese and English with HS codes for international mail.Tax datasetJP

OpenFisca France indirect taxation dataPrepares survey data for OpenFisca's French indirect-tax microsimulation.Tax datasetFR

originshiftUS non-preferential rules of origin (19 CFR 102.20 and 102.21) as a machine-readable corpus with a CLI.Tax datasetUS

product_hscode11,509 product descriptions mapped to HS codes, with a train and test split; provenance undocumented.Tax datasetGlobal

taric-opendataAutomated mirrors of tariff data from 18 sources (EU TARIC, GB, NO, CH, US) plus EBTI and ATaR rulings.Tax datasetEU · UK · NO · CH · US · Global

thai-customs-tariff-jsonParses the Thai Customs tariff master files into bilingual JSON by HS code, with WTO, FTA and ATIGA rates.Tax datasetTH

Trade-misinvoicing estimator replication40 Python scripts and cached UN Comtrade data for a paper on non-identified trade-misinvoicing estimators.Tax datasetGlobal

US Tax DatasetUS sales-tax rates, nexus thresholds and SaaS taxability, with a source for every record.Tax datasetUSPolyForm Internal Use 1.0.0

us-import-duty-hs6US duty rates by HS6 for consumer goods, including Section 301 and effective rates for Chinese origin.Tax datasetUS

us-sales-tax-20262026 US state sales-tax and lodging-tax rates for all 50 states, as an MIT-licensed dataset.Tax datasetUS

us-tariff-dataUS HTS as CSV and JSON with Chapter 99 duties by country, and EU duties by origin; a vendor's data dump.Tax datasetUS · EU

vat-rates (ibericode)Community-maintained collection of EU VAT rates, as a JSON file.Tax datasetEU

chapter_99_traversalTraversable CSV representation of HTS Chapter 99 from the USITC API.Tax datasetUSInactive since 2025Licence unknown

Customs-Declaration-Datasets54,000 synthetic customs import declarations generated with CTGAN by KAIST and GIST with Korea Customs.Tax datasetKR · GlobalDemo

dibp.actcR data package of the Combined Australian Customs Tariff Nomenclature 2017.Tax datasetAUInactive since 2019Licence unknown

Digital services VAT ratesMachine-readable VAT rates for digital services in EU member states and special territories.Tax datasetEUInactive since 2025

Harmonized Tariff Schedule of the United States 2025The 2025 US HTS as a clean dataset with text-model baselines predicting tariff outcomes; educational.Tax datasetUSInactive since 2025Demo

Magento EU Tax RatesEU VAT rates as CSV files for import into Magento shops.Tax datasetEUInactive since 2025Licence unknown

synthetic_tariff_classification_products_kr27,562 synthetic Korean product descriptions paired with 10-digit HS codes and rationales.Tax datasetKRDemo

Trade-IFFR scripts replicating Lepissier, Davis and Ibrahim (2021) on illicit financial flows from trade misinvoicing.Tax datasetGlobalInactive since 2022Licence unknown

Benchmarks

2 projects

Evals that show whether a model reasons about tax, or guesses.

HSCodeCompExpert-level benchmark for HS code classification agents on e-commerce products, from Alibaba's MarcoPolo.BenchmarkGlobal

UK Trade Tariff AI search evaluation suiteEvaluation suite for the UK tariff team's AI classification and search experiments on the Online Trade Tariff.BenchmarkUKDemo

Models

6 projects

Open AI models trained or tuned for tax text.

gemma4-hscode-classifierLoRA adapter classifying product descriptions to 8-digit HS codes with Cambodian trade rates; adapter only.ModelKHGemma Terms of Use

hs-code-classifier-en (Kenpache)HS6 classifier fine-tuned from bge-m3 (71.9% top-1 on full descriptions in its test set), with weights.ModelGlobal

hscode-classifier-en (ENTUM-AI)Deep-learning HS code classifier for English product descriptions, with weights.ModelGlobal

hscodeclassifyModernBERT classifier of product descriptions into the 20 HS chapters; chapter level only.ModelGlobal

UK Trade Tariff FPO commodity searchMachine-learning service from the UK tariff team that suggests commodity codes from parcel descriptions.ModelUK

hs-code-classifier (ShahinHasanov90)TF-IDF and LightGBM HS code classifier with a FastAPI service for English, Russian and Azerbaijani text.ModelGlobalDemo

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Next · Step 3 of 4The gapsThe activities with no open project yet, and the partly covered ones, with what to build on.