After you file


@justmewink wrote:

my routing # you have is wrong, take off the 15 on the end


If  you have filed the 2020 tax return with an incorrect account number that cannot be changed.  If this was for a tax refund the bank will reject the direct deposit and send the refund back to the IRS.  The IRS will then send the refund check in the mail to the address on the tax return.