If you haven't filed yet, here's how:
https://ttlc.intuit.com/replies/5619072
If you have filed already, you can't make changes. Don't worry though. The bank most likely will reject the deposit and the refund will go back to the IRS who will then issue you a check and mail it to the address listed on the return.
https://ttlc.intuit.com/replies/3302459