To go back to a lower version or 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
See instructions linked below.
How to downgrade in TurboTax Online
Tax Forms Included in each version of TurboTax Online
Depending on what your tax situation was last year, you might need to use new tax forms to claim the same deductions, credits, or forms of income. Some of the situations that are now in TurboTax Deluxe and TurboTax Live Deluxe, instead of in Free Edition, include: