How to File Income Tax Return Online in India for 2026

Kaustav Chowdhury
3 days ago
4 min read

Filing income tax returns for the 2026 assessment year comes with a notable change: the new Income Tax Act 2025 came into force on April 1, 2026, replacing the decades-old Income Tax Act 1961 as the governing statute for direct taxation in India. While the core filing mechanics on the incometax.gov.in portal remain broadly familiar, taxpayers need to understand the updated deadlines, the correct ITR form for their income profile, and how to reconcile their return against the Annual Information Statement and Form 26AS before submission.

Choosing the Right ITR Form

Most salaried individuals with straightforward income sources will file ITR-1, applicable to residents with income from salary, one house property, and other sources like interest, up to a specified income threshold. Those with capital gains, income from more than one house property, or foreign assets typically need ITR-2. Individuals with business or professional income opt for ITR-3, while those eligible for the presumptive taxation scheme under sections covering small businesses and professionals generally use ITR-4. Selecting the wrong form is one of the most common reasons returns get flagged for defective filing notices, so confirm your correct category before you start.

Key Filing Deadlines for 2026

For this filing cycle, taxpayers filing ITR-1 or ITR-2, typically salaried individuals and those without business income, must submit their returns by July 31. Taxpayers filing ITR-3 or ITR-4, generally those with business or professional income, have until August 31. These deadlines apply to taxpayers who are not required to get their accounts audited; audit cases carry separate, later deadlines. Missing the applicable deadline can trigger late filing fees and interest on any unpaid tax, so it is worth marking these dates well in advance rather than waiting until the final week.

Reconciling AIS and Form 26AS Before You File

Before filing, download and carefully review your Annual Information Statement, or AIS, and Form 26AS from the income tax portal. These documents consolidate information about your income as reported by employers, banks, and other institutions, including salary, interest income, dividends, mutual fund transactions, and tax deducted at source. Discrepancies between what you intend to declare and what appears in these statements are one of the most common triggers for a scrutiny notice or a mismatch query from the tax department. It is also worth reviewing the key Aadhaar, PAN and ITR compliance changes effective from July 2026, since several linkage and validation rules affecting this filing cycle took effect this month.

If you spot a discrepancy, such as interest income reported by a bank that you believe is inaccurate, or a TDS entry that does not match your records, raise a correction request with the reporting entity before filing your return, since correcting the AIS after filing is a more cumbersome process than resolving it at source. Reconciling these documents carefully also reduces your risk of receiving an income tax notice and having to respond to queries later, since most notices arise from mismatches that could have been caught during this reconciliation step.

Filing and E-Verification

Once your ITR form is filled out on the incometax.gov.in portal, whether using the pre-filled data or entering figures manually, you must verify the return within the prescribed period for it to be treated as validly filed. The fastest and most common method is e-verification via Aadhaar OTP, where a one-time password sent to your Aadhaar-linked mobile number confirms your identity and completes the filing instantly. Alternative verification methods include net banking-based e-verification or sending a physical signed acknowledgement to the Centralised Processing Centre, though these are slower and less commonly used given how convenient the Aadhaar OTP method has become.

If you are expecting a refund after filing, it is useful to understand how to claim an income tax refund online, including the process and timeline, since refunds are processed only after the return is filed and successfully e-verified, and delays in verification directly delay any refund due to you.

What Changes Under the Income Tax Act 2025

The Income Tax Act 2025 restructures and renumbers large portions of the earlier statute, simplifies some definitions, and consolidates provisions that were previously scattered across the 1961 Act and its numerous amendments. For most individual taxpayers, the practical filing experience on the portal changes far less than the underlying legal drafting, since the government has aimed to preserve the substantive tax treatment of common income heads like salary, house property, and capital gains, while cleaning up the structure and language of the law itself.

That said, taxpayers with more complex profiles, such as those with foreign income, trust structures, or specific deductions tied to provisions that have been renumbered or reworded, should have their return reviewed carefully this year, since even a purely structural change in the law can affect how software and the tax portal auto-populate certain fields. If you receive any query or notice referencing a section number that looks unfamiliar, cross-check it against the new Act's numbering before assuming an error.

Key Takeaways

The new Income Tax Act 2025 took effect April 1, 2026, and governs this year's filing cycle alongside the familiar incometax.gov.in portal.

ITR-1 and ITR-2 filers must submit returns by July 31, while ITR-3 and ITR-4 filers have until August 31, 2026.

Reconcile your AIS and Form 26AS against your own records before filing to avoid mismatches that trigger tax department queries.

E-verification via Aadhaar OTP is the fastest way to complete your filing and start the refund process, if applicable.

Filing early, rather than waiting for the deadline, gives you more time to fix any discrepancies flagged by the portal's validation checks and reduces the risk of last-minute technical issues on the filing website during peak submission days.