ITR Filing Deadline Near? Avoid These Costly Mistakes Before You Submit Your Tax Return

ITR Filing 2026: With the Income Tax Return (ITR) filing deadline approaching, many taxpayers are rushing to complete their returns. However, filing your return in haste could result in costly mistakes that may lead to tax notices, delayed refunds, additional tax liability, or the loss of eligible tax benefits. Experts advise taxpayers to carefully review all financial information before clicking the final "Submit" button.

From mismatches in the Annual Information Statement (AIS) to incorrect reporting of stock market transactions and missing interest income, even small errors can create unnecessary complications during return processing.

Here's a comprehensive guide to the key checks you should perform before filing your ITR.

Know the Important ITR Filing Deadlines

Understanding the applicable filing deadline is the first step toward timely compliance.

For individuals who do not have income from business or profession and are filing ITR-1 or ITR-2, the due date for filing the return is July 31, 2026.

Taxpayers with income from Futures & Options (F&O) trading or intraday trading, who are required to file under the applicable business income provisions, have a filing deadline of August 31, 2026, provided their accounts are not subject to audit.

If you miss the applicable due date, you may still be able to file a belated return until December 31, 2026, subject to the provisions of the Income Tax Act. A revised return to correct eligible mistakes can generally be filed until March 31, 2027, where permitted under the applicable rules.

Don't Depend Solely on the Annual Information Statement (AIS)

The Annual Information Statement (AIS) is a valuable tool for preparing your tax return, but it should not be treated as the only source of information.

Before filing your ITR, compare the details available in the AIS with:

  • Form 16
  • Form 26AS
  • Bank account statements
  • Mutual fund statements
  • Other investment and income records

If you notice any discrepancies, investigate them instead of assuming the AIS data is complete or error-free.

Ensure Bank Interest Income Is Fully Reported

Many taxpayers unintentionally omit interest earned from savings accounts or fixed deposits.

In some cases, this income may not appear correctly—or may not appear at all—in the AIS. However, the absence of information in the AIS does not remove the obligation to report taxable income.

Review all your bank statements and interest certificates carefully to ensure every eligible interest payment is included in your return.

Verify Mutual Fund and Property Transactions

Investment and property-related transactions require special attention.

For mutual fund investments, the same transaction may sometimes be reported more than once due to reporting by both the registrar and the broker. Carefully verify your statements before reporting capital gains.

Similarly, in jointly owned property transactions, the AIS may occasionally reflect the full sale value in the name of a single co-owner instead of allocating it proportionately.

If you identify any incorrect reporting, consider submitting feedback through the AIS portal and retain supporting documents for your records.

Select the Correct ITR Form for F&O and Intraday Trading

Choosing the wrong ITR form is another common filing mistake.

According to tax professionals, income from Futures & Options (F&O) and intraday equity trading is generally treated differently from regular capital gains for tax purposes. Some taxpayers mistakenly report such income using ITR-2, whereas the appropriate return form may be ITR-3, depending on their tax profile and applicable provisions.

Using the wrong return form may result in processing issues or require corrective action later.

Don't Forget to Report Foreign Income or Overseas Assets

If you own foreign assets or have earned income from overseas sources, those details should be disclosed wherever required under the applicable tax laws.

Tax authorities increasingly receive financial information through international information-sharing arrangements. As a result, taxpayers should ensure that any reportable foreign income or assets are accurately disclosed in their tax return.

Review your records carefully before filing to avoid omissions.

What Happens If You File Your Return Late?

Missing the ITR filing deadline may have financial consequences.

A belated return can generally be filed until December 31, 2026, but late filing may attract a fee of up to ₹5,000, depending on the taxpayer's circumstances and applicable provisions. For eligible taxpayers with total income up to ₹5 lakh, the reduced late filing fee may be ₹1,000, subject to the provisions of the Income Tax Act.

In addition to the late fee, taxpayers may also face interest on outstanding tax liabilities where applicable.

Complete the Verification Process After Filing

Submitting your ITR online is not the final step.

Once the return is filed, it must also be electronically verified. Without verification, the Income Tax Department generally treats the filing process as incomplete, and the return may not be processed.

Electronic verification can be completed through several methods, including:

  • Aadhaar OTP
  • Net Banking
  • Demat account
  • Other eligible electronic verification options available on the e-filing portal

Ensure that the verification is completed within the prescribed timeline after filing.

Final Checklist Before Clicking "Submit"

Before submitting your Income Tax Return, take a few extra minutes to review every detail. Confirm that:

  • Your personal and bank account information is accurate.
  • Income from all sources has been reported.
  • Interest from savings accounts and fixed deposits has been included.
  • AIS, Form 26AS, Form 16, and supporting documents match your return.
  • Mutual fund, stock market, and property transactions have been reported correctly.
  • The appropriate ITR form has been selected.
  • Foreign income or assets, where applicable, have been disclosed.
  • The return is electronically verified after submission.

A careful review today can help prevent tax notices, delayed refunds, additional tax liability, or unnecessary compliance issues in the future. Taking the time to file accurately is often far more valuable than filing quickly.