- Sign in to your TurboTax Online account.
- Select Intuit Account in the lower left corner.
- On the Welcome! screen, select Sign in & security.
- Select Email address, enter your new email address, confirm it and enter your password.
- Select Save and you're done.
https://ttlc.intuit.com/community/account-updates/help/how-do-i-change-my-turbotax-account-email/00/...
