Open Source Tax Software.
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Self-hosted AI accounting app. LLM analyzer for receipts, invoices, transactions with custom prompts and categories
Programming language for literate programming law specification
Handle all the hard stuff related to EU MOSS tax/vat regulations, the way it should be.
Crypto-currency tax calculator with support for all popular wallets, exchanges, explorers and migration from other crypto tax platforms
Open Source Java e-Invoicing library, validator and tool (Factur-X/ZUGFeRD, UNCEFACT/CII XRechnung)
Privacy-focused, free, open-source cryptocurrency tax calculator for multiple countries: it handles multiple coins/exchanges and computes long/short-term capital gains, cost bases, in/out lot relationships/fractioning, and account balances. It supports FIFO, LIFO, HIFO and it outputs in form 8949 format. It has a programmable plugin architecture
Open-source Tax Guides for AI agents, reviewed by named CPAs/CAs/EAs. 1,000+ Guides across 190+ jurisdictions. MCP server included. Works with Claude, ChatGPT, Cursor.
USA Federal Individual Income and Payroll Tax Microsimulation Model
French tax and benefit system for OpenFisca
Python lib for Factur-X, the e-invoicing standard for France and Germany
📝 Genera, firma, envía y recibe facturas electrónicas sin necesidad de ninguna librería adicional
Component using the European Commission (EC) VAT Information Exchange System (VIES) to verify and validate VAT registration numbers in the EU, using PHP and Composer.
Simple, yet powerful compliance solutions for Indian businesses
Validation artefacts for the European eInvoicing standard EN 16931
OpenFisca core engine. See other repositories for countries-specific code & data.
The PolicyEngine US Python package contains a rules engine of the US tax-benefit system, and microdata generation for microsimulation analysis.
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