ITR-U AY 2025-26 – Self-Assessment Tax Credit Disallowed Due to Portal Validation Issue

Need expert opinion on an ITR-U issue faced for AY 2025-26.

Self-assessment tax was actually paid earlier through valid challan before filing the return. However, while filing ITR-U after 31-12-2025, the income tax portal showed validation/error stating that earlier period tax could not be claimed. Since there was no other practical option to proceed with filing, the challan date was modified in the utility/portal to an earlier acceptable date and return was filed.

Now intimation has been received fully disallowing the tax credit.

Query:

  1. Is there any actual provision under Section 140B / 139(8A) prohibiting claim of SAT paid prior to 31-12-2025 while filing ITR-U after that date?

  2. Has anyone faced similar portal validation issues?

  3. What would be the best remedy now — rectification u/s 154, updated response, grievance, or revisional route?

Would appreciate views from anyone who has practically handled this issue.

Replies (1)

Do not file a new updated response. Instead, file an online Rectification Request u/s 154 on the portal choosing "Tax Credit Mismatch Correction" and supply the genuine challan parameters. If the system blocks it, escalate by filing an official portal grievance with the physical challan copy and Form 26AS attached.

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