I don't know which account I have on file for my direct deposit. It didn't show me. And now I don't see the File menu on the upper left so I can see which account you have on file for a direct deposit. It didn't ask me to enter one either. I just completed filing and was accepted.
If you already filed and the return has been accepted, it is too late to change banking information The IRS does not allow it.
REVIEW REFUND METHOD
If you entered incorrect banking information for your refund, you can change it if your return is rejected. If it is accepted, however, it is too late to change it. The bank will reject the refund and send it back to the IRS. Then the IRS will issue a paper check and mail it to the address you put on your tax return. Expect a delay of at least a couple of weeks to receive your refund.
Here is what the IRS says about entering incorrect banking information
If your refund is sent back to the IRS—- make certain that the address you entered on your Form 1040 is correct. And…open all mail, even if it looks like junk mail.