How to File Income Tax Return: Complete Step-by-Step Process

• Filing deadline: 31 July of the assessment year for most individual taxpayers (extensions possible)
• Choosing the correct ITR form is the first real decision — ITR-1 through ITR-4 cover most individual situations
• Core documents: PAN, Aadhaar, Form 16, Form 26AS, AIS, bank statements, investment proofs
• Filing and verification are two separate steps — an unverified return is treated as not filed
• Late filing under Section 234F can attract a penalty of up to Rs. 10,000
• A consistent ITR filing history strengthens your income documentation for a Bajaj Finance home loan application.

Filing your income tax return means formally reporting your income, deductions, and tax liability to the Income Tax Department for a given financial year, through the department's e-filing portal. It is a legal requirement under Section 139(1) of the Income Tax Act for anyone whose income exceeds the exemption threshold.

Filing on time isn't only about avoiding a penalty — a documented, on-time filing history becomes a financial record that lenders, visa authorities, and other institutions reference for years afterward.

The exemption threshold determining who must file varies by age and, for the new tax regime, by the specific income level relative to current slab structures — even someone whose final tax liability works out to nil may still be legally required to file if their gross income before deductions crosses the applicable threshold, a distinction that trips up taxpayers who assume "no tax owed" automatically means “no filing required.”

The first genuine decision in the filing process is selecting the correct form for your income situation — filing the wrong one results in a defective return notice requiring correction.

If you're unsure which applies, the e-filing portal's "Help me decide which ITR form to file" tool walks through a short set of questions to confirm the correct form before you begin — a more reliable starting point than guessing based on a previous year's form.

Income type, not income amount, is usually what determines the correct form — a taxpayer with a modest salary but even a small capital gain from selling shares needs ITR-2, not ITR-1, regardless of how well their total income would otherwise fit within ITR-1's Rs. 50 lakh ceiling. Checking this before you start saves the disruption of realising partway through a filing session that you've begun with the wrong form.

Having these ready before logging in keeps the actual filing session short and avoids interruptions partway through.

• PAN and Aadhaar: Your primary identity documents, linked to your e-filing account
• Form 16: From your employer, summarising salary paid and TDS deducted (salaried applicants)
• Form 26AS and AIS: The department's own record of TDS/TCS and broader financial information, to cross-check against your own figures
• Bank statements: For interest income and to verify your own records
• Investment and deduction proofs: 80C investments, insurance premiums, home loan interest certificates, and other claimed deductions

Cross-checking Form 16 against Form 26AS and AIS before you begin is worth the extra few minutes, since a mismatch discovered mid-filing is more disruptive to resolve than one caught in advance.

1. Log in to the e-filing portal at incometax.gov.in using your PAN and password.
2. Navigate to e-File > Income Tax Returns > File Income Tax Return.
3. Select the relevant assessment year and choose your filing mode (online is standard for most individuals).
4. Select the correct ITR form, based on your income situation.
5. Review your pre-filled data — salary, TDS, and other details auto-populated from Form 16, Form 26AS, and AIS.
6. Enter any additional income, deductions, and exemptions not already reflected.
7. Preview your computed tax liability or refund, and check for errors before proceeding.
8. Submit your return, then e-Verify it using Aadhaar OTP, net banking EVC, or another available method.

Submission and verification are genuinely separate steps — a submitted-but-unverified return carries the same consequences as not having filed at all once the verification window closes.

Once submitted, two things usually remain: confirming your return is verified, and tracking any refund due.

• Verification methods: Aadhaar OTP (near-instant), net banking EVC, bank/demat account EVC, or a signed physical ITR-V sent by post to the Centralised Processing Centre in Bengaluru
• Verification window: 30 days from the date of filing
• Refund tracking: Check status under the "Refund/Demand Status" section of your e-filing account once your return is processed
• Revising a return: If you discover an error after filing, a revised return can be filed before the end of the relevant assessment year or before assessment is completed, whichever comes first
   

An unverified ITR is treated by the department as invalid, regardless of how complete or accurate the original submission was — verification is not an optional final step.

Consider Rohit, a 31-year-old product manager in Bengaluru earning Rs. 1.4 lakh a month, with a CIBIL score of 756, who also earned Rs. 45,000 in interest income and sold some equity shares for a modest capital gain this year.

Rohit's capital gains income meant ITR-1 was never an option for him, despite his salary alone comfortably fitting that form's income threshold — a reminder that form selection depends on income type, not just the total amount.

A consistent, on-time ITR filing history — the last 2-3 years, in most cases — is standard income documentation for a home loan application, alongside Form 16 for salaried applicants. Check your home loan eligibility once your filings are in order.