See this TurboTax support FAQ for how to downgrade - https://ttlc.intuit.com/turbotax-support/en-us/help-article/change-service-level/downgrade-lower-priced-version-turbotax-online/L2IDaMvkt_US_en_US?uid=mah46fnq
OR -
If you have not paid for the online edition you are using, have not filed your tax return or registered the Free edition, then you can clear your return and start over with a lower priced edition. Click on Tax Tools on the left side of the program screen while working on the 2024 online tax return. Click on Clear & Start Over.