Did you already file? If your return is Accepted it is too late to change it. If the bank rejects the refund deposit the IRS will mail a check to the address on your return. If you haven't filed yet you can change it by going though the File tab.
How to change your bank account deposit info
https://ttlc.intuit.com/community/accessing/help/how-do-i-change-my-transferred-direct-deposit-information/00/27040