Revised ITR Filing for FY 2025-26: Complete Deadline Guide

Revised ITR Filing for FY 2025-26: Complete Deadline Guide

If you are planning to file a revised income tax return for Financial Year 2025-26, understanding the correct deadline is essential. Many taxpayers are confused because of the upcoming transition to the new Tax Year framework. However, revised return timelines for FY 2025-26 continue to follow the existing rules.

Let’s break it down in a simple and structured way.

Important Filing Timeline

  • Financial Year (FY): 2025-26
  • Assessment Year (AY): 2026-27
  • Last date to file revised return: 31 December 2026 (as permitted under Section 139(5))

This is the final date by which any correction or update to an already filed return must be submitted.

Why Is the Deadline 31 December 2026?

Under the current law, a revised return can be filed up to three months before the end of the relevant assessment year.

  • Assessment Year 2026-27 ends on 31 March 2027
  • Three months prior to that date is 31 December 2026

This rule continues to apply to FY 2025-26 despite upcoming structural changes in the tax framework.

Important Clarification

Some taxpayers assume that the revised return deadline shifts to 31 March because of the new Tax Year regime. That is not the case here.

The extended timeline applies only to returns governed under the new system starting Tax Year 2026-27. Since FY 2025-26 falls under the existing framework, its revised return deadline remains unchanged.

Comparison of Revised Return Deadlines

Period Revised Return Allowed Up To
FY 2024-25 (AY 2025-26) 31 December 2025
FY 2025-26 (AY 2026-27) 31 December 2026
Tax Year 2026-27 onward 31 March 2028
Key Takeaway: For FY 2025-26, revised income tax returns must be filed no later than 31 December 2026. The upcoming Tax Year regime does not change this deadline because it applies prospectively, not retrospectively.

In Simple Terms

If you need to correct or update your return for FY 2025-26, make sure it is done before 31 December 2026. Waiting beyond this date could mean losing the opportunity to revise your filing.