Specifiction
For vendors
AdvertiseTop spots, featured rows, home sponsor Get listedAdd a product we don't cover yet Claim a listingFree: verify the domain, then correct your page Vendor dashboardNumbers, orders and placements
List your tool
Vendor dashboard
Tech riderRev. 8 Oct 2026

OpenTax

Ch 196.6of 33 AI Tax Software
  1. 1Runs onAPI, self-hosted, Web
  2. 2CostsFree plan
  3. 3Taxpayer typespersonal
  4. 4AI tax guidanceYes
  5. 5Document importYes
  6. 6Filing supportboth
6 lines stated Written from the maker's own pages: opentax.evokelab.ai
Visit site Alternatives
The OpenTax homepage

Overview

OpenTax is ranked #19 of 33 in AI tax software on Specifiction. It runs on API, Self-hosted, Web. There is a free plan.

OpenTax plans and pricing

All plans
Free forever Free Free forever No upsells or paywalls · Every feature available to everyone opentax.evokelab.ai · 8 Oct 2026

Compared on AI tax software

Free plan
Yesopentax.evokelab.ai
Taxpayer types
personalopentax.evokelab.ai
AI tax guidance
Yesopentax.evokelab.ai
Document import
Yesopentax.evokelab.ai
Filing support
bothopentax.evokelab.ai

Facts

Purpose
OpenTax is open-source tax preparation software for individual filers that explains how each return number was computed.opentax.evokelab.ai · 8 Oct 2026
Supported returns
The standalone documentation lists federal returns and 42 supported state returns, with federal and state computed together.opentax.evokelab.ai · 8 Oct 2026
Tax year and scope
The limitations page says OpenTax supports Tax Year 2025, is for individual filers, and does not support business returns or prior-year returns.opentax.evokelab.ai · 8 Oct 2026
Filing output
OpenTax generates IRS-ready PDFs to download, print, and mail; e-filing support is described as being on the roadmap.opentax.evokelab.ai · 8 Oct 2026
Explainability
Computed values can be traced to source documents, IRS citations, and the intermediate calculations that produced them.opentax.evokelab.ai · 8 Oct 2026
Validation
The Trust Center reports 2,300+ automated tests and 10 validated tax scenarios.opentax.evokelab.ai · 8 Oct 2026
Privacy
The privacy policy says OpenTax does not collect or transmit personal or tax data, and stores return data in the user's browser IndexedDB.opentax.evokelab.ai · 8 Oct 2026
Integration
The OpenClaw plugin provides 16 tools, REST endpoints, and server-sent event streaming for compatible AI agents.opentax.evokelab.ai · 8 Oct 2026
Developer API
Developers can use TaxService directly in Node.js to create returns, compute results, and trace return lines.opentax.evokelab.ai · 8 Oct 2026
Notable limits
The limitations page says multi-state returns are unsupported, and e-filing, farming income, foreign income reporting, and business returns are not covered.opentax.evokelab.ai · 8 Oct 2026
Support
The Trust Center directs users to report tax-accuracy issues through a GitHub issue.opentax.evokelab.ai · 8 Oct 2026
Disclaimer
OpenTax says it is not affiliated with the IRS and is not tax advice.opentax.evokelab.ai · 8 Oct 2026

Best OpenTax alternatives

See all 20
All accessCh 01 TelosTax Free planAndroidiOS Free to start7.6 All accessCh 02 EZTax Free trialAndroidiOS from ₹208.25/mo7.5 All accessCh 03 H&R Block Online Free planWebiOS Free to start7.2 All accessCh 04 Keeper Free trialAndroidiOS 7.1 All accessCh 05 TaxAct Free planWeb from $44.99/mo7.1 All accessCh 06 Taxation.ai Free planFree trialAPI from $49/mo7.1

Where it ranks on Specifiction

Is OpenTax yours?

Claim it for free: prove the domain, then correct facts, plans and screenshots. An editor reviews every change.

Claim it free Promote OpenTax

Sources