How do I add my email

1. Sign in to your TurboTax Online account.
2. Select Intuit Account in the lower left corner.
3. On the Welcome! screen, select Sign in & security.
4. Select Email address, enter your new email address, confirm it and enter your password.
5. Select Save and you're done.

https://ttlc.intuit.com/community/account-updates/help/how-do-i-change-my-turbotax-account-email/00/26385