How to File Your Income Tax Return: A Step-by-Step Walkthrough

Filing an ITR looks intimidating mostly because of the paperwork it implies, not because any individual step is hard. Here's the actual sequence, in order. If you haven't checked whether you're required to file in the first place, start there before working through these steps.

Step 1: Gather your documents

Before opening anything, collect: PAN and Aadhaar, Form 16 (if salaried), bank interest certificates, capital gains statements from your broker or mutual fund platform, home loan interest certificate if applicable, and proof of any deductions you plan to claim under the old regime. Having these ready before you start prevents the frustrating mid-form scramble for a number you don't have memorized.

Step 2: Check Form 26AS and AIS

Log into the income tax portal and pull up Form 26AS and the Annual Information Statement. These show what's already been reported against your PAN, TDS, interest, dividends, and high-value transactions. Cross-check this against your own records before you start filling anything in. Catching a mismatch now is far less painful than explaining it after filing.

Step 3: Choose your tax regime

Decide between the new and old regime. If you have meaningful old-regime deductions, 80C investments, HRA, home loan interest, run the calculation both ways before deciding. The portal will ask you to actively choose; it won't pick the better one for you.

A worked comparison. Take a salaried employee with ₹11 lakh gross income and ₹2.5 lakh of old-regime deductions (80C, 80D, and home loan interest combined). Under the new regime, the ₹75,000 standard deduction brings taxable income to roughly ₹10.25 lakh, and the Section 87A rebate structure for FY 2025-26 means this still lands well inside the effectively-tax-free zone for salaried filers. Under the old regime, the same ₹2.5 lakh of deductions plus the smaller standard deduction bring taxable income down further, but starting from a lower basic exemption and higher slab rates. For this specific income level, the two regimes can land close enough that the deciding factor is often whether the deductions were already committed to for other reasons (like an existing home loan), not the tax saving alone. The only way to know for a given year is to run both.

Step 4: Pick the correct ITR form

ITR-1 for straightforward salaried income with no capital gains. ITR-2 if you have capital gains or multiple house properties. ITR-3 or ITR-4 for business or professional income. Filing under the wrong form is one of the most common reasons a return gets marked defective.

Step 5: Fill in your income details

Enter salary details (pre-filled from Form 16 data if available), other income sources, capital gains, and any deductions you're claiming. The portal auto-fills a lot of this from Form 26AS and AIS data now, but auto-filled doesn't mean correct, check every pre-filled number against your own documents.

Step 6: Reconcile tax already paid

The system will calculate tax payable based on what you've entered, then subtract TDS already deducted and any advance tax paid. What's left is either a refund due to you or additional tax you owe. If tax is due, pay it through the portal before submitting; unpaid tax at submission time can affect your acknowledgment status.

Step 7: Submit and verify

Submitting the form isn't the final step. You then need to verify the return, electronically through Aadhaar OTP or net banking is the fastest option, within the required window. An unverified return is treated as not filed at all, so don't stop at "submitted."

Step 8: Download your acknowledgment

Once verified, download the ITR-V acknowledgment for your records. Keep it, along with the documents you gathered in Step 1, for at least a few years; it's what you'll reach for if a loan application or visa office asks for proof of past filings. Before you submit, it's worth a quick pass through common filing mistakes to catch anything this walkthrough didn't flag for your specific situation.

This article is educational and not personalised financial advice. The process referenced here reflects the position as of AY 2026-27 per the Income Tax Department; always confirm current steps and deadlines there before filing.