You have to have the email address changed by the security team. If someone could just change an email address, it would make things too insecure. The team checks to be sure it is you making the change and not someone trying to get into your information.
Submit an account recovery Request with proof of your identify. It will usually be processed in 24 hours.
https://ttlc.intuit.com/turbotax-support/en-us/help-article/security-risk/account-recovery-request-t...
