You can also purchase the CD/download from various retailers such as Costco, Amazon, Walmart, Best Buy, Staples, Sam’s Club, etc. etc. etc.
This link Where can I obtain authentic TurboTax software? has a list of authorized TurboTax resellers.
The TurboTax online and desktop editions for tax year 2020 are available. However, the 2020 program is not yet finalized while awaiting the IRS to approve many of the 2020 Forms, Schedules and instructions.