To change bank account information in TurboTax Online:

1. Sign in, then Continue your/take me to my return
   
2. Go to File (top right). Complete Step 1, Start/Revisit Step 2
   
3. TurboTax will ask 'How would you like to get your federal refund?' Answer: In Your Bank 
   
   Note: Select Show All to display bank information. To change what's displayed: Uncheck I want my refund deposited into this account, change info on the next page.