Open Source Tax Software.

Convert GOBL into VeriFactu documents and send to the AEAT

MCP server for French tax calculations and information - enables AI assistants to provide accurate French tax guidance

France-Data module of OpenFisca

MCP server for US individual taxpayers — 39 tools for federal/state tax calculations, credits, deductions, retirement strategies, and tax planning. All calculations run locally. TY2024 + TY2025 (OBBB Act).

Model Context Protocol (MCP) server for ELSTER (German tax portal). Submit UStVA, prepare EUER/ESt, sync inbox + history via Puppeteer.

Claude Code/Codex agent skills for preparing Dutch income tax and voorlopige aanslag workpacks.

Beancount plugin for generating informational UK tax report (calculate capital gains tax)

Local-first MCP server for Indian income tax: deterministic tax computation, regime comparison, advance tax planning, document parsing -- all on your machine

Convert GOBL documents into the Spanish FacturaE format

🚗 Motorrijtuigenbelasting (MRB) berekenen in JavaScript

MCP server for AI-assisted tax filing through FreeTaxUSA using Playwright browser automation

Free equity-compensation tax optimizer for AI agents — ISO/AMT, NSO, RSU sell-vs-hold, QSBS, concentration & hedging. Deterministic math, federal + 50 states + DC, multi-year plans. Remote MCP + REST, no signup.

Simplify Tax is an AI-powered tax filing and optimization tool designed to assist Indian taxpayers in understanding their tax obligations, maximizing deductions, and selecting the most beneficial regime. It reads bank statements, classifies income, calculates tax liabilities, and recommends the optimal tax-saving strategy — all automatically.

Java library helping you to handle ZUGFeRD invoices

A module for explicability from the trace of a catala program

Bulletin officiel des finances publiques - impôts, non-instruct (11-12-2023) This project focuses on fine-tuning pre-trained language models to create efficient and accurate models for legal practice. Fine-tuning is the process of adapting a pre-trained model to perform specific tasks or cater to particular domains. It involves adjusting the model's parameters through a further round of training on task-specific or domain-specific data. While conventional fine-tuning strategies… See the full description on the dataset page: https://huggingface.co/datasets/louisbrulenaudet/bofip.

Retrieval Augmented Generation (RAG) dataset for Brazilian Federal Revenue Service (Receita Federal do Brasil ― RFB).

MCP server for AI invoicing — Create invoices, track expenses & generate tax reports with Claude, Cursor & any MCP-compatible AI assistant

ATO Rulings & Guidance — Australian Tax Law, Structured for AI 67,000+ Australian Taxation Office documents as RAG-ready NDJSON/CSV — Edited Private Advice, public rulings and determinations, ATO Interpretative Decisions, practical compliance guidelines, taxpayer alerts, decision impact statements, practice statements and legislative instruments. Every document parsed into structured, typed fields for legal RAG, LLM fine-tuning, and tax research automation. Machine-readable… See the full description on the dataset page: https://huggingface.co/datasets/simplelex/ATO-Australian-Tax-Rulings-and-Guidance.