I forgot to enter my bank account information to get my tax refund

If you filed and it is Accepted it's too late.  The IRS will mail a check to the address on your return.  

some research I did suggests calling the IRS to see if you can get direct deposit. you have nothing to lose. let us know what happens so that when others ask we can advise them.

Every year you file your tax return, you must enter your direct deposit information to get your refund electronically. This information includes your bank information. If you enter your information incorrectly or omitted it, 

1. Call 1-800-829-1040 between the hours of 7:00 AM – 7:00 PM local time.
2. Press “1” for English or “2” for Spanish.
3. Press “2” for “answers about your personal income taxes.”
4. Press “1” for “questions about a form you have already submitted or a payment or to order a tax transcript.”
5. Press “3” for “all other questions about your tax history or payment.”
6. Press “2” for “all other questions about your tax history or payment.”
7. Do not input your Social Security Number when the recording tells you to.
8. Press “2” for “personal- or individual-tax related question.”
9. Press “3” for “all other inquiries.”
10. Wait to be connected to someone at the IRS.