Open Ledger
Built at OpenAI GPT-5 Startup Hackathon · Aug 9, 2025
TaxMCP is a GPT‑5–powered 1040 tax calculation engine and benchmark harness. It orchestrates GPT‑5 with tool calls to authoritative IRS data (exact tax table lookups), evaluates outputs against TaxCalcBench TY24 ground truth (strict/lenient), and packages a reproducible CLI + MCP tool server.
