The TurboTax desktop editions for 2020 are available for purchase and download on this TurboTax website - https://turbotax.intuit.com/personal-taxes/cd-download/
However, as it occurs each tax year there will be many updates to the software before you will be able to file a 2020 tax return in 2021. Make sure that you have your preferences set to receive the updates when you start the program. The IRS has many forms. schedules and instructions for tax year 2020 which have not yet been finalized by the IRS.
