Open Source Tax Software.
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Fully open-source US federal tax engine. Single binary cli. Runs on macOS, Linux, and Windows. Built for AI agents using AI agents.
Tunisian tax and benefit system for OpenFisca
TAXSIM emulator using the PolicyEngine US federal and state tax calculator
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).
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
A module for explicability from the trace of a catala program
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.
Microsimulation of French firms tax system
Official Model Context Protocol (MCP) server for vatnode — EU VAT validation, rates, and format checks for AI agents (Claude, Cursor, ChatGPT).
VAT ID validateion MCP server using https://ec.europa.eu/taxation_customs/vies/
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