If you have not filed yet: To change your direct deposit information (or to change it if you haven't already filed or if you get rejected):

1. Open your return in TurboTax.

2. Click on “Take me to my return” if applicable.

3. Go to the “File” section in the left-hand menu.

4. Next to Step 2: Your refund info select “Revisit”.  (Stop here if you're just checking.)

5. Choose your desired refund method and select Continue.

If you have already submitted your tax return, unfortunately there is no way to change it unless the IRS rejects the return for some reason. You can try calling the IRS to stop the direct deposit, if your return hasn't posted to their system yet (and you're willing to get your refund via paper check). For security reasons, the IRS cannot re-route your refund to a different account.
 

Please see the TurboTax FAQ below for additional information:

What if I entered the wrong bank account for direct deposit?

YOU DIRTY [removed]! I'VE BEEN USING TURBOTAX FOR OVER 20 YEARS AND THIS YEAR IT HAS GONE TO [removed]. I WILL NEVER BUY AN INTUIT PRODUCT AGAIN!

FOR STARTERS:

NO PROMPTS FOR CRYPTO CURRENCY TRANSACTIONS,

NO ABILITY TO CHANGE DIRECT DEPOSIT ACCOUNT INFORMATION,

I'M UNABLE TO FILE BECAUSE MY SCKEDULE K-1 FORMS HAVE BOX 16 CHECKED AND DO NOT INCLUDE K-3 INFORMATION. SO I HAVE TO LIE TO THE IRS TO FILE? YOU BASTARDS!

NOW I CAN'T EVEN TALK TO SOMEONE ON THE PHONE UNLESS I PAY FOR CONSULTATIONS?

NEVER AGAIN YOU [removed]!