The TurboTax online editions for tax year 2020 will not be available until early December.

The TurboTax desktop CD/Download editions for tax year 2020 are available for purchase on this website - https://turbotax.intuit.com/personal-taxes/cd-download/

If you qualify you can use one of the 10 IRS FREE FILE options that will be available mid January ... for 2020 your AGI must be $72K or less ...  https://www.irs.gov/filing/free-file-do-your-federal-taxes-for-free