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
Crypto-currency tax calculator with support for all popular wallets, exchanges, explorers and migration from other crypto tax platforms
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
確定申告自動化 AI エージェントプラグイン — 帳簿管理から e-Tax 入力代行まで
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.
French tax and benefit system for OpenFisca
USA Federal Individual Income and Payroll Tax Microsimulation Model
Calculate UK capital gains from broker exports — supports Charles Schwab, Freetrade, Hargreaves Lansdown, Interactive Brokers, Morgan Stanley, Sharesight, Trading 212, Vanguard and a custom RAW format.
The PolicyEngine US Python package contains a rules engine of the US tax-benefit system, and microdata generation for microsimulation analysis.
The deterministic tax engine for AI agents. Highest score ever recorded on TaxCalcBench (96% exact returns)
Python library to compute US federal taxes, and state taxes for some states.
AI-powered bookkeeping and tax filing automation via MCP for entrepreneurs at the heart of the European economy
An open-source static tax-benefit microsimulation model for the UK.
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