regarding change in bank particulars for refund after ITR filing

After upload of the ITR, if any change occurs in taxpayers Bank Account, Address, Mobile number and e-mail id, then taxpayer can update these changes through 'Change ITR Form Particulars'. Any update can be made only prior to processing of the return. 

Perform the following steps to change the particulars in the submitted ITR Form:

Has your refund not credited due to wrong bank mandate?

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.

Refer::    Resolution_FAQ-refund_final.

It is seen that refund failure due to wrong account detail and returned processed and 143(1) order issued but refund not received.

1 Logon to the 'e-Filing' Portal www.incometaxindiaefiling.gov.in Step     

 2 Go to the 'My Account' menu located at upper-left side of the page ⇒ Click 'Service Request' ⇒ Select the 'Request Type' as 'New Request' and Select the 'Request Category' as 'Refund reissue' ⇒ Click 'Submit

3. file the approiate filed and Refund will be processed
Read more at: https://www.caclubindia.com/forum/regarding-change-in-bank-particulars-for-refund-after-itr-filing-470000.asp

It is seen that refund failure due to wrong account detail and returned processed and 143(1) order issued but refund not received.

1 Logon to the 'e-Filing' Portal www.incometaxindiaefiling.gov.in Step     

 2 Go to the 'My Account' menu located at upper-left side of the page ⇒ Click 'Service Request' ⇒ Select the 'Request Type' as 'New Request' and Select the 'Request Category' as 'Refund reissue' ⇒ Click 'Submit

3. file the approiate filed and Refund will be processed
Read more at: https://www.caclubindia.com/forum/regarding-change-in-bank-particulars-for-refund-after-itr-filing-470000.asp