In TurboTax Online, you can clear and start over as long as you haven't paid or registered yet (free users are asked to register their accounts before they file).
A reason you might want to clear and start over is if you think you’re in a higher-priced version of TurboTax and don’t need to be. Have a look below under Related Information for more details.
Mobile app users can’t clear and start over. If you’re using the mobile app, log in to your TurboTax account from a browser instead.
If you're signed in under last year's login, we'll automatically transfer last year's info over if you select the PLUS upgrade, Deluxe, Premier, or Self-Employed. Federal Free Edition (without PLUS) does not include the year-over-year transfer feature.