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.
A taxpayer is eligible for interest on refunds but not all refunds, as per rules. The interest component was missing in the income tax refunds received by many taxpayers.
No interest shall be payable if the amount of refund is less than 10 percent of the tax determined on summary assessment or regular assessment
When and how much interest one is eligible for.