ITR Refund Claims: What Taxpayers Face After December 31

With only one day left before December 31, there are some significant changes that a tax payer needs to be aware of, particularly a large number of income tax returns for the current assessment year remain stuck in the system. Some of these returns involve refund claims, while others have been held back because the tax department's software flagged mismatches between Form 16 and the details declared in the return. In certain cases, deductions such as political donations or other disclosures have triggered alerts, and final calculations have not yet been issued by the department.

Changes After December 31

Once the calendar moves past December 31, taxpayers will lose the right to voluntarily revise their return for the year. This holds true even if their return is still waiting to be processed. Many taxpayers mistakenly believe that as long as the process is pending, they can revise it later. That is not the case. The right to revise ends with the deadline, not with the completion of processing. After the deadline, any correction becomes a formal procedure rather than a voluntary choice.

Pending Returns

By December 28, around 8.5 crore income tax returns had been filed and verified for the assessment year 2025-26. Out of these, about 7.8 crore returns had already been processed. That leaves more than 70 lakh returns still waiting at the Centralised Processing Centre.

This year, more than 21 lakh revised returns were filed, in most of the cases, after taxpayers received alerts about mismatches or compliance reminders from the department. Experts point out that a large share of the pending processing cases involve refund claims, which are automatically held back as discrepancies are detected.

Options After the Deadline

If a return is processed after December 31 and the department makes an adjustment, taxpayers have fewer options. They can no longer file a revised return. Instead, they must use the provision called the "updated return" under Section 139(8A). This allows corrections up to four years after the end of the assessment year, but it comes with a cost.

The law requires taxpayers filing updated returns to pay extra tax. The additional tax is 25 percent in the first year, 50 percent in the second year, 60 percent in the third year, and 70 percent in the fourth year. Once an updated return is filed, it must also be verified.

If the Centralised Processing Centre later rejects a claim, such as a deduction for political donations, the department will issue an intimation under Section 143(1). This means the taxpayer will receive a notice of tax demand for the disallowed amount, along with interest. Since the mismatch was flagged earlier and the taxpayer did not revise before the deadline, the department may treat this as misreporting of income. In such cases, penalties can range from 50 percent to 200 percent of the tax avoided, under Section 270A.

Refunds

Taxpayers should note that refunds do not disappear simply because a return remains unprocessed after December 31. The law gives the department time to complete the processing, and refunds that arise after processing are still payable. Where delays are not the taxpayer's fault, interest is also added.

However, refunds linked to unresolved discrepancies remain frozen until the issue is settled. If a taxpayer was asked to file a revised return but did not do so before December 31, the original return becomes final from their side. They lose the chance to correct mistakes without penalty.

How Long the Department Has to Process Returns

The Centralised Processing Centre has up to nine months from the end of the financial year in which the return was filed to process it. For example, if a return was filed on July 31, 2025, or even on December 31, 2025, the department can process it any time up to December 31, 2026. If the department fails to process the return within this period and it is not taken up for assessment or reassessment, the taxpayer becomes entitled to the refund claimed in the return, along with interest.

Although the law sets a clear time limit for processing, it does not separately define a time limit for issuing refunds. In practice, refunds are usually released within about a week after the return is processed.

Interest on Delayed Refunds

When a refund is due, the law requires the government to pay simple interest at the rate of 0.5 percent per month or part of a month. This works out to an annual interest rate of 6 percent. The interest is calculated monthly on the refund amount until the date the refund is granted.

Why December 31 Matters

The deadline is not about whether refunds arrive sooner or later. It is about control. Before December 31, taxpayers have the power to correct their own mistakes. After that, the system takes over, and corrections become more expensive and complicated.

Advisors warn taxpayers who have received mismatch alerts to act quickly. Assuming that delays in processing will fix the problem is risky. Once the revision window closes, even small errors can become costly to undo.