You cannot edit your bank information if the Efile is accepted.

If it is rejected your can change the bank information and re Efile.

To change your bank account numbers:

1. Log back into TurboTax and select the "Take Me to My Return" button, then select the File button (left hand side in black box).
2. As you walk through the questions, make sure that the box stating "I want my refund deposited into this account" is checked. 
3. Scroll down to the bottom of the page and select Continue. 
4. You will be taken to a new screen titled, "Let's get your bank account info".

Have you already e-filed your return? If so, then you will not be able to change your bank details. You will have to wait to see if your tax return is accepted or rejected by the IRS. 

If the return is rejected, then you can update your information and resubmit your return. Should the tax return be accepted and the IRS (and State, if any) cannot deposit your refund to your account, then a paper check will be mailed to you.

You can refer to this TurboTax FAQ for complete information:

https://ttlc.intuit.com/replies/3302459