@ rogkm56tm asked: "Is someone using my account?"
This is a user community forum, so no one here can know that. Do you see evidence of unusual activity in your account? Is a tax return being prepared you don't recognize?
If you are concerned about account security, you can phone TurboTax Support. I left contact info lower down. You can also change your password and can view your "Account activity".
Log in, then at the bottom of the left column menu choose Intuit Account.
In the account settings choose the tab "Sign in & Security."
You can change your password and add additional authentication, if desired.
Also, while you are on that "Sign in & security screen," you can look to see what browser (and when) has been accessing your online account. There should be a link called "Account activity."
Here's how to contact TurboTax for more specific help or concerns:
Contact TurboTax
Hours 5AM-9PM Pacific, 7 days per week
https://ttlc.intuit.com/turbotax-support/en-us/contact/
