When I filed my return I accidentally put in an old bank account that I had which is closed now, I contacted my bank and they said that they already sent the refund back

[LauraShine · Accepted solution]

If you inadvertently used an old bank account and the bank indeed sent the refund back to the IRS, the IRS will send you a paper check.

This is not uncommon. They will send it to the address on file.