We can tell you how to update the email address in your profile in Account Settings. But first we need you to clarify "where" you are being asked for a 6-digit code. Is it when you try to log into Online TurboTax, and it asks for a 6-digit 2-factor authentication code?
Or can you get into your account OK, but when you are in the process of efiling, is it asking for a 6-digit "email verification code?"
If you can't log in, then we will need to tell you how to recover account access. Then once you are back in your account how to get to the Intuit Account settings to make the change.
