If you have not filed yet or your efile rejects, you can change your refund method and bank info by going through the File tab again. If your return was Accepted then it's too late to change it. If your bank rejects the deposit the IRS will mail a check to the address on your return.
See if one of these helps
https://ttlc.intuit.com/community/accessing/help/how-do-i-change-my-transferred-direct-deposit-infor...
https://ttlc.intuit.com/community/refunds/help/what-if-i-entered-the-wrong-bank-account-for-direct-d...
