If you have not filed yet, then go back through the interview to file your return. When you get to the screen where it asks how do you want your refund, you can change it there.
If you already filed your return you will have to wait until you get the status of your return (accepted or rejected). The IRS is not accepting returns until January 23rd.
If it gets accepted you will not be able to change it, if your banking information is wrong, then your refund will automatically be switched to receiving a check once your bank rejects the direct deposit.
If your return gets rejected, you can change your refund option, and the re-e-file
