You will need to check your authorization or voucher to see if the EFT Return or SPP Return stamp was applied to the document. This stamp means your money went to a closed or incorrect account and the bank returned the money to DFAS.
If you see an EFT Return or SPP Return stamp: amend the document; change the EFT account information under Additional Options/Profile/My Account Information. Make sure you click the Save changes to permanent traveler information and route the document for approval.
If the document does not have an EFT Return or SPP Return stamp, an EFT Trace Request needs to be submitted to identify where the money was sent to.