The deadline for filing a revised tax return for FY 2019-20 (AY 2020-21) has passed, with the final date being 31st May 2021. If you missed this deadline and need to change bank details for a refund, you can only do so if your original return was processed but the refund failed. In such cases, you can request a refund re-issue through the 'My Account' section on the Income Tax e-Filing website, choosing between ECS or cheque and providing your updated bank account and address details.
06 March 2022
You can only change your Bank Account Number if you had a refund failure i.e your IT Return is processed and a refund was generated for you but you did not receive it.
If you wish to change the Bank Account Number for Refund failure case, then login in the Income Tax e-Filing website and go to 'My Account' → 'Refund re-issue request'.
Select the mode through which you wish to receive the refund- ECS or Cheque.
Enter the new Bank Account Number and provide address details. Submit the request.
Once the request is submitted, your new Address is updated with the Income Tax Department.