If you have not registered, paid or e-filed you can clear and start over in a lower version of the software.
CLEAR AND START OVER
https://ttlc.intuit.com/turbotax-support/en-us/help-article/change-service-level/clear-start-turbotax-online/L37BZFuBV_US_en_US?uid=m6b26ost
https://turbotax.intuit.com/personal-taxes/online/free-edition.jsp
https://ttlc.intuit.com/turbotax-support/en-us/help-article/change-service-level/downgrade-lower-priced-version-turbotax-online/L2IDaMvkt_US_en_US?uid=m5ydiw67
TO REMOVE TURBOTAX LIVE
https://ttlc.intuit.com/turbotax-support/en-us/help-article/intuit-subscriptions/remove-turbotax-live/L3WW5jwOM_US_en_US?uid=ma8s9fn5
HOW CAN I DOWNGRADE TO A LOWER VERSION
https://ttlc.intuit.com/turbotax-support/en-us/help-article/change-service-level/downgrade-lower-priced-version-turbotax-online/L2IDaMvkt_US_en_US?uid=m6ilzady