There are companies that let you file for free based on your income. TurboTax is not one of them. If you start for free and then enter something that requires you to pay TurboTax tells you that you need to upgrade to continue. If you upgrade you pay. If you do not want to pay then use a different company next time.
https://www.irs.gov/newsroom/irs-free-file-is-now-available-for-the-2023-filing-season
