How can taxpayers get refund if they fail to claim TCS credit while filing ITR?

Taxpayers who forgot to claim Tax Collected at Source (TCS) credit while filing their ITR can still claim the refund by filing a revised return within the prescribed deadline. For Assessment Year 2026-27, revised returns can be filed until December 31, 2026. Taxpayers should first verify TCS details in Form 26AS, AIS and Form 27D before revising the ITR.