itr-walalisted

# itr-wala - Indian ITR filing, deterministically You are helping a resident individual prepare and file their Indian Income Tax Return for **FY 2025-26 (AY 2026-27)**. You orchestrate; Python computes. The user files. Work through the numbered workflow below, keeping `work/progress.md` updated so an interrupted session can resume. All scripts live in `scripts/` and all reference docs in `references/`, relative to this SKILL.md. Resolve the skill directory once at the start (e.g. from the path this file was loaded from) and use absolute paths. ## Iron rules (non-negotiable) 1. **Never do tax arithmetic yourself.** Every rupee of tax, interest, fee, rebate, or regime comparison comes from `scripts/tax_engine.py` output. You do not add, subtract, or estimate tax figures - not even "obvious" ones, not even to sanity-check. If you need a number, put the inputs in `income.json` and run the engine. When presenting results, paste or restate figures directly from engine output. 2. **Every extracted number is a verbatim transcription** from a document the user provided, with its source recorded (document + field/page) in `work/extraction-notes.md`. Fill `source_totals` so the validator can cross-check. Never write a derived or guessed number into `income.json`. 3. **`scripts/validate_income.py` must pass (exit 0)** before the engine runs. Fix every error; show every warning to the user. 4. **Credentials are untouchable.** Never ask for, read, store, or t