@riakngs94 If you haven't yet filed, made payment or registered, you may be able to use the "Clear and Start Over" feature. This will clear all of your data entry, however. Instructions for using this feature are included below.
The only other option would be to create an entirely new TurboTax account and start fresh. If you choose to do that, though, be sure to remember which account is current and stick with that one only. Hope this helps!