What a session looks like
Self-test first, so the engine proves its math before touching your return. Then documents, extraction with validation, a deduction hunt, both regimes computed, and a filing pack that maps every portal field to its value.
Free and open source. The AI reads your Form 16 and AIS and interviews you for missed deductions; a tested Python engine does all the math. No CA, no ₹3,000 fee, and only you ever click Pay, Submit, or e-Verify.
/plugin marketplace add karanb192/itr-wala
Every AI tax demo this season had the same silent flaw: the model was doing the arithmetic. LLMs are magnificent at reading a Form 16 and terrible at applying s.87A marginal relief. itr-wala splits the work the way it should be split.
These layers catch real bugs. The fuzzer found a one-in-350,000 rounding edge where ₹52,880 more salary computed ₹10 less tax. Fixed, pinned as a regression test. That find-fix-pin loop is the thing a prompt-only tax tool cannot run. If your CA can show you their test suite, hire them.
Self-test first, so the engine proves its math before touching your return. Then documents, extraction with validation, a deduction hunt, both regimes computed, and a filing pack that maps every portal field to its value.
Out of scope, and it says so instead of guessing: non-residents, F&O and intraday, audit cases, foreign tax credit, ESOP deferral. Built by someone who files his own taxes with it and does security for a living.
No, and that is the point. You are trusting a tested Python engine with the math and an LLM with reading PDFs and explaining things, which are the two things each is actually good at. The test suite runs in front of you before your return is touched, and you can run it yourself.
Yes. You prepare your own return and file it yourself on the government portal, same as using the portal's own forms, just with better preparation. The tool never submits anything on your behalf.
Nothing. MIT-licensed, free forever. The only cost is your existing Claude Code (or Codex/Gemini CLI) subscription doing the document reading. The tax math is plain Python and costs nothing no matter how many times you recheck.
Use whatever you trust. This is for people who would rather review every number themselves than pay ₹3,000+ to hope someone else did. The filing pack it generates is also a great ₹0 first draft to hand a CA for a cheap review, it is built to be handed over.
Resident individuals, AY 2026-27, ITR-1 through ITR-4 with the form picked for you: salary and multiple employers, house property, equity and MF capital gains, crypto, interest and dividends, family pension, presumptive income basics, both regimes with surcharge and marginal relief, advance-tax interest, late fees, and belated returns. What it cannot compute safely, it names and points you to a CA for.