TelosTax

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Score7.4

Rank#2 of 33

PriceFree

Free planYes

Runs onAndroid, iOS, Linux, macOS, Web, Windows

Summary

TelosTax is a free, open-source tax preparation app for the 2025 tax year, built around an open-source tax engine. It offers AI tax guidance, document import, deduction finding, and federal and state filing. Its stated scope includes Form 1040 with Schedules A–H, SE, and D, more than 30 supplemental forms, and tax calculations for all 50 states and Washington, DC. The project lists 41 IRS and 43 state PDF templates with automatic field mapping and says its features are intended to cover about 85–90% of individual filers. Private Mode is described as fully offline. Optional AI functions use your Anthropic API key, with personal information removed before transmission. Tax data is encrypted at rest, and the calculation layer is described as operating without database access or network calls. The app is installable on desktop and mobile and supports Android, iOS, Linux, macOS, web, and Windows. The published scope matrix covers federal tax year 2025.

Who it is for

TelosTax suits individual filers seeking tax preparation with document import and deduction finding, particularly those who want an offline mode. Its stated federal scope is limited to tax year 2025.

What is good

Free, open-source tax preparation app.
Supports federal filing and all states plus Washington, DC.
Private Mode is described as fully offline.
Lists 41 IRS and 43 state PDF templates.
Available across desktop, mobile, and web platforms.

What to know first

Published federal support is limited to tax year 2025.
Optional AI features require your Anthropic API key.

Verdict

TelosTax combines federal and state filing with document import, deduction finding, and optional AI assistance. Check its 2025 federal scope against the tax year you need before choosing it.

TelosTax plans and pricing

All plans

Free Free Free, open-source tax preparation app for tax year 2025 github.com · 3 Oct 2026

Compared on AI tax software

Free plan: Yestelostax.app
Taxpayer types: personaltelostax.app
AI tax guidance: Yestelostax.app
Document import: Yestelostax.app
Deduction finding: Yestelostax.app
Filing support: bothtelostax.app

Facts

Product: TelosTax is an AI tax tool.techyorker.com · 3 Oct 2026
Tax guidance: TelosTax lists AI tax guidance as a feature.techyorker.com · 3 Oct 2026
Deductions: TelosTax lists deduction finding as a feature.techyorker.com · 3 Oct 2026
Platforms: TelosTax runs on web, Windows, Mac, Linux, iPhone and iPad, and Android.techyorker.com · 3 Oct 2026
Pricing: The maker does not publish plan prices on its site.techyorker.com · 3 Oct 2026
Purpose: TelosTax is a browser-based tax preparation app for the 2025 tax year, powered by an open-source tax engine.github.com · 3 Oct 2026
Tax coverage: The project reports 90+ tax features intended to cover about 85–90% of individual filers.github.com · 3 Oct 2026
Federal forms: It supports Form 1040 with Schedules A–H, SE, and D, plus more than 30 supplemental forms.github.com · 3 Oct 2026
State coverage: The project says it supports tax calculations for all 50 states and Washington, DC.github.com · 3 Oct 2026
PDF forms: It lists 41 IRS PDF templates and 43 state PDF templates with auto-populated field mapping.github.com · 3 Oct 2026
Privacy modes: Private Mode is described as fully offline, while optional BYOK Mode uses the user's Anthropic API key for AI chat, expense scanning, and document extraction, with PII stripped before transmission.github.com · 3 Oct 2026
Encryption: The project states that tax data is encrypted at rest with AES-256-GCM.github.com · 3 Oct 2026
Calculation engine: The tax engine is described as a standalone pure-function library with no database access or network calls in its calculation layer.github.com · 3 Oct 2026
Legal traceability: The project says computations are traced to the Internal Revenue Code, Treasury Regulations, Revenue Procedures, or IRS form instructions.github.com · 3 Oct 2026
Tax year limit: The published scope matrix specifies federal tax year 2025 support.github.com · 3 Oct 2026
Testing: The repository reports more than 6,100 tests across 139 test files.github.com · 3 Oct 2026
Availability: The repository describes the app as offline-capable and installable on desktop and mobile.github.com · 3 Oct 2026
AI integration: Optional AI features use a user-supplied Anthropic API key.github.com · 3 Oct 2026
License and maker: The repository identifies TelosTax as a free, open-source project from Telos News and lists an MIT license.github.com · 3 Oct 2026