No. 106of 123 ·Personal Tax Software

SuperTaxAgent

Windows · Mac · Linux

Freedom report

Two barsScore 5.1

Free tierA free tier is on its own pricing page
Runs widely3 of 6 device platforms
DocumentedThinly documented

SuperTaxAgent is ranked #106 of 123 in personal tax software on Freedom251. It runs on Linux, macOS, Windows. There is a free plan.

SuperTaxAgent plans and pricing

All plans

Free Free Open-source; US federal returns; 2025 tax year; no state returns or e-filing; Form 1040, Schedule B, Schedule D, and Form 8949 github.com · 12 Oct 2026

Compared on personal tax software

Free plan: Yes
Self-employment support: No
Investment income: Yes
Rental income: Yes
State filing: none

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The record

Purpose: SuperTaxAgent is an open-source AI-powered tool for preparing US federal tax returns inside Claude Code.
Return output: It can fill an official IRS Form 1040 PDF that is ready to print and mail.
Document import: It parses W-2, 1099-B, 1099-DIV, 1099-INT, 1099-DA, and 1099-MISC documents from PDFs or images and auto-detects the document type.
Calculations: It calculates income, AGI, deductions, tax brackets, credits including CTC and EIC, and refund or amount owed, mapping results to Form 1040 lines.
Tax topics: Its domain skills cover RSUs and ESPP, rental income, wash sales, and cryptocurrency topics including cost basis, staking, and DeFi.
Comparison and contributions: Users can compare its return with a TurboTax PDF, classify discrepancies, generate skill fixes, and submit anonymized rule improvements as a GitHub pull request.
Privacy: The project says tax profiles and calculations stay locally in a gitignored data directory and imported PDFs are never uploaded.
Improvement data: The project says self-evolution pull requests contain only anonymized rule fixes without personally identifiable information and require explicit user review.
Supported year: The README specifies the 2025 tax year for filing in 2026, with year-specific brackets, credits, and standard deduction amounts.
Limits: The README lists no state returns, no e-filing, no AMT calculation, and no Schedule C support; it says Schedule C is coming soon.
Intended users: The project describes itself as software for individuals preparing their own tax returns and says it is intended for self-preparation.
Support: The maker lists an email address for collaboration, bug reports that users do not want to make public, and general contact.
License: The project is licensed under Apache License 2.0 and permits free personal and commercial use, modification, and distribution with attribution requirements.
Price from: Free

Where it ranks on Freedom251

Best Personal Tax Software in 2026#106 of 123

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Sources

github.com/Fangyi-Chen/SuperTaxAgent· checked 12 Oct 2026