Unfortunately, if you have already e-filed your
return, then you will have to wait to see if you return is accepted or
reject. If rejected, you can follow the steps above and
update the information. If your return is accepted, you would not be able to change the
information. Once accepted if the IRS is unable to deposit the refund into the
bank account provided you would then receive a paper check in the mail. If your return is accepted, you may
be able to try calling the IRS e-file payment services at 1-888-353-4537 for help
in updating the banking information.