As the deadline for filing Income Tax Returns (ITR) for Assessment Year 2026–27 approaches, taxpayers are being urged to file carefully and on time. According to the Income Tax Department, more than 30 million (3 crore) ITRs had already been filed as of July 22, 2026, with filing activity accelerating as the due date nears.

For individuals and salaried taxpayers who are not subject to tax audit, the last date to file ITR is July 31, 2026. Missing the deadline, reporting incorrect income, or failing to comply with tax rules could result in penalties ranging from late filing fees to fines of up to 200% of the tax payable in serious cases.

Here are five important Income Tax rules every taxpayer should know before filing an ITR.

1. Missing the July 31 Deadline Can Lead to a Late Filing Fee

Taxpayers who fail to file their ITR by July 31, 2026, may be required to pay a late filing fee under Section 234F of the Income Tax Act.

The applicable fee is:

• Up to ₹1,000 if total income does not exceed ₹5 lakh
• Up to ₹5,000 if total income exceeds ₹5 lakh

Filing your return before the due date can help avoid these additional charges.

2. Delayed Revised Returns May Also Attract a Penalty

If you discover an error in your originally filed ITR, you can submit a revised return.

However, delaying the revision beyond the prescribed timeline may result in additional charges.

Under Section 234I, filing a revised return between nine and twelve months after the end of the assessment year may attract a fee ranging from ₹1,000 to ₹5,000, subject to applicable conditions.

3. Incorrect Income Reporting Can Result in a Penalty of Up to 200%

Providing inaccurate financial information is among the most serious tax violations.

Under Section 270A:

• Under-reporting income may attract a penalty equal to 50% of the tax payable on the under-reported income.
• Misreporting or deliberately providing false information can lead to a penalty of up to 200% of the tax payable.

Taxpayers should ensure all income sources, deductions, and financial details are reported accurately.

4. Cash Transactions Above ₹2 Lakh Can Trigger a 100% Penalty

The Income Tax Act imposes strict restrictions on large cash transactions.

Under Section 269ST, accepting ₹2 lakh or more in cash in a single transaction, from one person in a day, or in relation to a single event may violate the law.

In such cases, the penalty can be equal to the entire amount of cash received, making compliance extremely important.

5. Outstanding Self-Assessment Tax Must Be Paid Before Filing

If your tax calculation shows additional tax payable after considering TDS and advance tax, you must pay the self-assessment tax before filing your return.

Failure to do so may invite action under Sections 140A and 221, where the Assessing Officer may impose an additional penalty that could extend up to the amount of the outstanding tax, depending on the circumstances.

Over 3 Crore Returns Already Filed

According to the Income Tax Department, more than 3 crore Income Tax Returns for Assessment Year 2026–27 had been filed by July 22, 2026.

To support taxpayers during the peak filing period, the department has announced that its e-filing portal and Centralized Processing Centre (CPC) helpline will operate 24×7 from July 25 through July 31, enabling taxpayers to receive assistance until the filing deadline.

File Carefully and Avoid Costly Mistakes

Timely and accurate filing can help taxpayers avoid unnecessary penalties and legal complications. Before submitting your return, verify your income details, tax deductions, TDS credits, bank information, and any tax payable to ensure everything is correct.

While most filing errors can be corrected, intentional misreporting or repeated non-compliance can result in significant financial consequences under the Income Tax Act.

Disclaimer: Tax laws and penalties are subject to the provisions of the Income Tax Act and applicable government notifications. Taxpayers should consult a qualified tax professional or refer to official Income Tax Department guidance before making tax-related decisions.