If you e-filed:
Banking information for direct deposit is wrong or closed
If you entered incorrect banking information for your refund, you can change it if your return is rejected. If it is accepted, however, it is too late to change it. The bank will reject the refund and send it back to the IRS. Then the IRS will issue a paper check and mail it to the address you put on your tax return. Expect a delay of at least a couple of weeks to receive your refund.
Here is what the IRS says about entering incorrect banking information
If your refund is sent back to the IRS—- make certain that the address you entered on your Form 1040 is correct. And…open all mail, even if it looks like junk mail.
If your refund has been deposited in someone else's bank account, it's too late to change the bank information that you entered on your tax return. You should contact the bank, explain the error, and ask the bank if they will help you recover the money. If the bank won't help, you will have to consult a lawyer.
The IRS and the bank followed your instructions and deposited your refund in the account that you designated on your tax return. They are not at fault, and they are not obligated to correct your error.
See the following page on the IRS web site, particularly the third bullet under Scenario and the fourth (last) bullet under Solution.