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How to recheck an old FY 2025-26 tax result after the 1.3.0 fix with Itr Wala

Recompute your FY 2025-26 tax to see whether an earlier install understated new-regime tax.

  • Money
  • Intermediate
  • 30 minutes
  • From the README
  • Claude Code
  • Codex
  • Gemini CLI

Who it is forA taxpayer who used an Itr Wala install older than 1.3.0 for FY 2025-26, with special-rate gains or income above ₹12 lakh.

The problemInstalls before 1.3.0 could understate new-regime tax when rebate or marginal relief applied, so an earlier result may be wrong.

The outcomeA recomputed FY 2025-26 result from the corrected engine, to compare with your filed return and any processing intimation.

What you need first

  • Python 3 installed, to run the bundled scripts and the self-test
  • git, to clone the repo and review the files before installing
  • An AI agent that the README names: Claude Code, Codex, or Gemini
  • Your Form 16 and AIS (JSON) for the income year you are filing
  • Time to review the output and to pay, submit, and e-verify on the income tax portal yourself

Steps

  1. git clone https://github.com/karanb192/itr-wala.git
  2. cd itr-wala && ./install.sh
  3. Update your install using the instructions in docs/rebate-correction.md for your install route.
  4. python3 skills/itr-wala/scripts/tax_engine.py skills/itr-wala/assets/example-income.json
  5. Run the same command on your own income file and compare the new-regime total with your filed return.

Prompt for your agent

Using the itr-wala repo at <repo-path>, update to version 1.3.0 or later, then recompute the FY 2025-26 tax for <your-income-file>. Expected output: a recomputed new-regime total and the difference from the earlier result; verify the engine version is 1.3.0 or later before comparing with the filed return.

Caveat. A model-independent engine can still contain bugs, so the tests do not replace your own review of the recomputed numbers.

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