If you have received an intimation from Income-tax Department or Refund Banker(SBI) that the refund processing has failed due to in-correct bank details, you need to follow below guide. You will have to submit a refund re-issue request in your Income-tax Department's website login and update your Correct or New bank Account Number.
1) Login or Register on Income-tax website - click here
2) From the Top Menu, select My Account >> Refund Re-issue Request.
3) Select Assessment Year >> Enter CPC Communication Reference Number (refer intimation 143(1) notice from Income-tax Department) and Refund Sequence Number.
Please refer to the below given pictorial representation indicating the CPC reference number and refund sequence number
4) Select mode of Refund reissue and update your correct / new bank account number.
Note: Please check intimation u/s 143(1) to find above information. If you do not have intimation u/s 143(1) then submit a request for the same from the menu 'My Account >> Request for intimation u/s 143(1)
After few days of request submission you will get the refund in your account.