Click on the My Account link, then on Clear and Start Over and choose a lower version.
If you have a Schedule C that transferred in from your prior year's return, you'll need to properly delete that Schedule C. See the info below.<a rel="nofollow" target="_blank" href="https://ttlc.intuit.com/questions/1899235-how-do-i-delete-a-prior-year-schedule-c-business-that-transferred-over">https://ttlc.intuit.com/questions/1899235-how-do-i-delete-a-prior-year-schedule-c-business-that-transferred-over</a>