ITR Filing Guide: A Step-by-Step Walkthrough
Filing your Income Tax Return (ITR) is easier than most people think — and with the deadline approaching, the process rewards a little preparation. This guide walks you through the whole journey: picking the right form, gathering documents, computing your tax, and e-filing on the income tax portal.
In this article
Why file at all
Filing is compulsory if your income crosses certain thresholds (see our filing flowchart), but it's worth doing even when optional: you may get a refund of TDS deducted from your salary or bank interest, a lower return is needed for loan applications, and a filed return is your record of income for the year.
Which ITR form is right for you
| Form | Who uses it |
|---|---|
| ITR-1 (Sahaj) | Salaried employees with income up to ₹50 lakh, plus income from a single house property and interest. Not for capital gains or business income. |
| ITR-2 | Individuals and HUFs with capital gains, multiple house properties, or foreign assets. No business income. |
| ITR-3 | Individuals and HUFs with income from business or profession (including freelancers and partners). |
| ITR-4 (Sugam) | Presumptive income schemes (Section 44AD/44ADA/44AE) — small businesses and professionals. |
Documents you'll need
- Form 16 and Form 16A/16B/16C (TDS certificates)
- Form 26AS / AIS (Annual Information Statement) — available on the portal
- Bank statements and interest certificates
- Investment proofs (80C, 80D, home loan certificates)
- Capital gains statements from your broker or fund house, if applicable
- PAN card and Aadhaar
The filing process step by step
- Log in to the e-filing portal (incometax.gov.in) with your PAN and password.
- Open the "File Income Tax Return" section and choose the assessment year.
- Pick your ITR form and select the tax regime (old or new).
- Pre-fill and review — the portal pre-fills salary, TDS and bank details from your AIS. Correct anything wrong.
- Declare all income — salary, house property, capital gains, and other sources.
- Claim deductions relevant to your regime.
- Verify your tax — the portal computes tax and shows any refund due or tax payable.
- Submit, then complete verification (e-verification via Aadhaar OTP, net banking, or by sending the signed ITR-V).
Deadlines and late fees
For most individuals the due date is 31 July of the assessment year (30 September or 30 November if tax audit applies). Filing late triggers a fee under Section 234F — up to ₹5,000 — and you may lose the ability to carry forward losses. Interest under Section 234A, 234B, 234C may also apply on unpaid tax.
Missed the deadline? You can still file a belated return, but only until 31 December of the assessment year, and with penalties. Always check the current year's extended dates announced by the government.
Common mistakes to avoid
- Forgetting the regime choice — compare before you lock in; you can't easily switch for business income.
- Ignoring capital gains — even small share sales must be reported.
- Mismatching bank interest — report all interest; the department sees it in your AIS.
- Not verifying — a return is "filed" only after verification. Unverified returns are treated as never filed.
- Entering wrong bank details — delays your refund.
Related: First find out whether you need to file at all with the Am I required to file? flowchart.