Here is the statement from Turbo tax’s website on what is free and what is not:
TurboTax Online: Important Details about Free Filing for Simple Tax Returns
If you have a simple tax return, you can file for free with TurboTax Free Edition or TurboTax Live Assisted Basic. You can also file with TurboTax Live Full Service Basic at the listed price.
A simple tax return is one that’s filed using IRS Form 1040 only, without having to attach any forms or schedules. Only certain taxpayers are eligible.
Situations covered (assuming no added tax complexity):
Limited interest and dividend income reported on a 1099-INT or 1099-DIV
IRS standard deduction
Earned Income Tax Credit (EIC)
Child tax credits
Student loan interest deduction
Situations not covered:
Unemployment income reported on a 1099-G
Business or 1099-NEC income
Rental property income
Credits, deductions and income reported on other forms or schedules (for example, income related to crypto investments)