To go back to the Free Edition you can try to clear and start over https://ttlc.intuit.com/community/using-turbotax/help/how-do-i-clear-and-start-over-in-turbotax-online/00/26444
If you started your tax return in TurboTax Free Edition (Form 1040 with limited credits; roughly 37% of taxpayers qualify), you won't need to clear and start over. You can select Switch to Free Edition instead.
In the Turbo Tax Free Edition, information that you can enter is limited now. Why do I have to upgrade from the Free Edition?
https://ttlc.intuit.com/community/upgrading/help/why-do-i-have-to-upgrade-from-free-edition/00/26379
Or try the IRS Free File program
https://www.irs.gov/filing/free-file-do-your-federal-taxes-for-free
Or you can start a new account and the Online Free Edition here,
https://turbotax.intuit.com/personal-taxes/online/free-edition.jsp
To file your taxes for free using TurboTax, you can use the TurboTax Free Edition. This edition is suitable for simple tax returns, specifically Form 1040 without additional schedules except for Earned Income Tax Credit, Child Tax Credit, and student loan interest
Here’s how you can do it: