1. Login to GST Portal

  2. Go to Services > Refunds > Track Application Status

  3. Select the Filing Year or enter ARN i.e. Application Reference Number

  4. You can now see the Search details 

  5. If the Bank Validation Status is 'failed', click on Update Bank Account

  6. Select Account Number from dropdown list. All the details of the bank account would be auto-populated. Click on Proceed

  7.  Select authorised signatory and file using DSC or EVC

Read step-wise process - GST Refund : Track Refund Application Status