Once your return has been accepted, it's too late to change your bank account for direct deposit.
If you haven't filed yet, you can still change your bank account info for direct deposit.
If the info you provided is for a closed or invalid account, the government will mail you a refund check.
Here is a link regarding incorrect banking information for direct deposit.
https://ttlc.intuit.com/questions/1901677-what-if-i-entered-the-wrong-bank-account-for-direct-deposi...
