If you haven't filed, registered or paid you can try to clear and start over in Free
https://ttlc.intuit.com/community/using-turbotax/help/how-do-i-clear-and-start-over-in-turbotax-online/00/26444
Or if it doesn't let you clear and you haven't paid and filed you could just start a new account. Online is only good for 1 return per account. But you can use the same email address for 5 accounts.
You can start another return in TurboTax Online by:
- Logging out if you are in your account
- Choose what TurboTax Online product you want to use for the second return
- Create your account screen
- Set up a new login for the second return
- Start working on the new return
Did you have anything that transferred from 2024 that’s making you use Premium?