You can downgrade your version of TurboTax Online by
using the Clear and Start Over option. This will clear
everything from the return and you can start over using the version that you
want.
Note: 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).
https://ttlc.intuit.com/replies/3288495
