Bank account information cannot be changed on an accepted return. If the bank account information was entered incorrectly, and the return was accepted, a check will be mailed to the mailing address you provided when you filed your return.
To fix the banking information in a rejected return, click the Filing tab and repeat the filing steps. On the screen titled E-Filing - Federal Refund Options click Direct Deposit. Fix the error and complete the remaining steps. You must click Submit at the end for your return to be re-transmitted.