Once your return is accepted, the banking information you provided on the return cannot be changed. When the return is accepted, the IRS and/or state will begin processing the return. This process cannot be stopped. The return cannot be transmitted again with the correct information if the return was accepted. However, if the return was rejected, you can correct the banking information before resubmitting the return.
If you are expecting a refund, the IRS and/or your state(s) will first attempt to deposit your refund based on the banking information you provided. If the information that was entered was invalid or incorrect, the bank will refuse this attempted deposit. At that point, the IRS and/or state(s) would then issue a check to you for the amount of your refund. The check will generally be mailed to the mailing address that you listed on your return when it was filed.
What happens if I owe the IRS/state and I enter incorrect banking information?
If you have an amount due to the IRS and/or state(s), the IRS and/or state(s) will attempt to make the withdrawal based on the banking information that you provided. If the account information is incorrect, the bank will refuse the debit. At that point, you may pay your amount due by mailing in your payment. To do this, you simply need to print the payment voucher and mail it, along with your payment, to the address that is provided on the voucher. Use the printer icon on the My Account screen next to the accepted return to print out the voucher. You may also go to IRS.gov payments and make a payment online.