Interest on tax refund not received? This may be the reason

If ITR has been furnished by the assessee on or before the due date, the interest shall be payable from April 1 of the Assessment Year to the date on which the refund is granted.

from Moneycontrol Economy News https://www.moneycontrol.com/news/economy/interesttax-refund-not-received-this-may-bereason_15026941.html
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