How do I go back to absolute zero?

If you have not paid for or registered your TurboTax return then you can use the Clear and Start Over feature. 

1. While in your TurboTax Online program (after clicking Continue your return)
   Select My Account, then click on Clear & start over.
2. On the Are you sure you want to clear your return? pop up screen, if you are sure about clearing all your entries and starting over, click Yes. 
   Then a new screen confirms you have cleared your entries, click Continue.
3. A Help us find the right TurboTax product for you screen shows the TurboTax Online products and features.
4. Select your new TurboTax Online product by clicking the Start for Free button.

For more information, please see the article below. https://ttlc.intuit.com/replies/4248526