It's legit. It's just the marketing dept. You might have another account or filed a different way. It's common. to have more than 1 account. Or even someone else might have typed their email wrong and got your by mistake. Just ignore the email.
How to view all your accounts
https://ttlc.intuit.com/turbotax-support/en-us/help-article/account-management/many-intuit-accounts-...
