SelfTax

Self-hosted · API · Extension

Freedom report

Two barsScore 6.2

Free tierA free tier is on its own pricing page
Open codeNo open-source code on record
Runs widely0 of 6 device platforms
DocumentedPlans, terms and facts published

SelfTax is ranked #14 of 33 in AI tax software on Freedom251. It runs on API, Browser extension, Self-hosted. There is a free plan.

SelfTax plans and pricing

All plans

Free Free Free AI-powered tax preparation · federal return · supported free IRS filing sites github.com · 8 Oct 2026

Compared on AI tax software

Free plan: Yes
Taxpayer types: personal
AI tax guidance: No
Document import: Yes
Filing support: federal

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The record

Purpose: SelfTax reads tax documents, calculates a federal return, and auto-fills supported free IRS filing sites.
Tax calculations: Tax calculations use deterministic code, and the README says each line can be audited.
Document parsing: Structured IRS forms are processed locally; AI is used only to parse unstructured documents when needed.
Privacy: The README says SSNs, names, and addresses are stored in browser local storage and never transmitted.
Redaction: Before unstructured document text is sent for AI interpretation, the README says identifying details are replaced with tokens locally.
Supported filing: Tested and verified support includes W-2 wages, rental income with passive activity loss, capital loss carryover, itemized deductions, child tax credit, dependent care credit, and QBI deduction for tax year 2025.
Unverified coverage: The README lists several features as built but not fully tested, including Schedule C, K-1, education credits, EITC, AMT, and self-employment tax.
Browser extension: The README instructs users to build and load SelfTax as a Chrome extension.
Local server: An optional local HTTP server uses the Claude Code CLI to parse redacted documents, and the user’s Anthropic API key is managed by that CLI.
MCP integration: SelfTax can run as an MCP server for Claude Code and exposes tools to scan tax folders, set a profile, view documents, calculate taxes, and generate forms.
Open-source license: SelfTax is licensed under AGPL-3.0, which the README says requires products or services built using the code to open-source their version under the same license.
Intended user: The maker describes the project as built for people who want to avoid paying for tax preparation or spending hours filing their taxes.
Price from: Free

Where it ranks on Freedom251

Best AI Tax Software in 2026#14 of 33

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Sources

github.com/selftax/selftax· checked 8 Oct 2026