As long as you have not yet e-filed your tax return then:
Sign into your account, click take me to my return
2. Click the File heading
3. Complete the information in Step 1
4. Step 2, this is where the bank account information will be. Follow the prompts to edit your bank account information.
Please see the following TurboTax FAQ if your bank account information transferred in from last year and you are having trouble changing it:
Unfortunately, if you have already e-filed your return, then you will have to wait to see if you return is accepted or reject