fortax-advance-tax-and-interestlisted

# Advance tax and interest under 234A, 234B and 234C Needs Python 3 and internet: runs `scripts/fortax.py` (the Fortax engine on ai.fortax.in; your file is processed and not stored). `scripts/compute_interest_234.py` runs locally (MIT, see `LICENSE-THIRD-PARTY-india-itr-copilot.txt`). ## Do the work, then stop at the payment The estimate, the instalment working, the interest computation, the challan tie-out and the filled e-Pay Tax screen are yours. **You never pay.** The CA presses Pay and completes the bank authentication. Refusing the working because the payment is theirs is a failure. Say where you will stop, then start. ## Step 0 — fix the year, and say which one you are in FY is April to March; AY = FY + 1. Advance tax is paid **during** the FY on that FY's income; self-assessment tax after it ends. Both carry the same AY on the challan and are told apart only by the minor head — get that wrong and the credit lands in the wrong bucket. State at the top of every working: the FY, the AY, the date you are computing as at, and whether the figures are estimated or actual. ## Step 1 — estimate the current-year income A forecast, and it must say so on its face. Build it from evidence, not from last year scaled up. | Head | Evidence | Trap | |---|---|---| | Salary | Payslips to date projected for the balance, the employer's TDS projection | Bonus, arrears, ESOP perquisite, mid-year job change | | House property | Rent agreement, interest certificate | Vacancy; a let-out