How to File Your Income Tax Return (ITR) Online: Step-by-Step Guide

Filing an Income Tax Return (ITR) sounds intimidating mostly because of the paperwork involved, not the actual filing step — the government's e-filing portal does most of the calculation for you once your details are entered correctly. Here's the order that actually works, gathering documents first so you're not hunting for numbers mid-form.

Who needs to file an ITR

You're generally required to file if your total income before deductions exceeds the basic exemption limit for your chosen regime, even if tax works out to zero after rebate. Filing is also worth doing voluntarily if you want to claim a refund (excess TDS deducted), carry forward a capital loss to offset future gains, or need an ITR-V as income proof for a loan or visa application — lenders and embassies routinely ask for the last 2-3 years' filed returns.

Documents to gather before you start

• Form 16 from your employer — shows salary paid and TDS deducted for the year.
• Form 26AS and the Annual Information Statement (AIS), both downloadable from the e-filing portal — these show all tax deducted/collected against your PAN, and other reported financial transactions.
• Bank statements — for interest income and to cross-check TDS on fixed deposits.
• Proof of deductions you plan to claim under the old regime — 80C investment receipts, rent receipts for HRA, home loan interest certificate.
• Capital gains statements from your broker or mutual fund platform, if you sold any investments during the year.

Step-by-step: filing on the e-filing portal

1. Log in at the official Income Tax e-filing portal (incometax.gov.in) using your PAN as the user ID.
2. Go to "File Income Tax Return" and select the correct assessment year.
3. Choose the correct ITR form — ITR-1 covers most salaried individuals with straightforward income; other forms apply if you have capital gains, business income or multiple house properties.
4. Let the portal pre-fill your salary, TDS and interest details from Form 26AS/AIS, then check every pre-filled figure against your own Form 16 and bank statements rather than trusting it blindly.
5. Choose your tax regime for the year and enter any deductions you're claiming (only relevant if you pick the old regime).
6. Review the computed tax, pay any balance due through the portal if applicable, then submit.
7. E-verify the return — via Aadhaar OTP, net banking, or another supported method. An unverified return is treated as not filed at all.

Common mistakes that trigger a notice

• Skipping income that already has TDS deducted (like a second employer's salary or interest income) because it feels like it's "already taxed" — it still needs to be reported and reconciled against your total tax liability.
• Choosing the wrong ITR form for your income type.
• Mismatches between what you report and what's shown in Form 26AS/AIS — always reconcile these before submitting, not after.
• Forgetting to e-verify, which leaves an otherwise-correct return incomplete.

Use our Income Tax Calculator to estimate your liability under both regimes before you start filing, so you already know roughly what to expect and can pick the regime that suits you before you're mid-form on the portal.