If the IRS encounters any problem sending the direct deposit, they change it to a check sent by mail. They don't spend any time trying to figure out why the direct deposit didn't work, or trying to make it work. Also, they will not send more than three direct deposit refunds to the same bank account. Any additional refunds are sent by mail.
In any case, there's nothing you can do about it at this point, so just wait for the check to come in the mail.
You could try asking your bank whether they rejected the direct deposit, and if so, why. That might help you figure out what went wrong and possibly correct it for next year. But it's possible that the direct deposit never got to your bank. If you talk to someone at the bank, also ask them what the correct routing number is for direct deposits, and make sure you entered it correctly. Also double-check the account number that you entered.
