If you paid for the Online version you can ask if they will give you the download program. How to contact Turbo Tax
https://ttlc.intuit.com/community/using-turbotax/help/how-do-i-contact-turbotax/00/26991
What is the Turbo Tax phone number
https://ttlc.intuit.com/community/using-turbotax/help/what-is-the-turbotax-phone-number/00/25632
Or you can go ahead and buy it. How to switch to Desktop,
Download the .tax2021 file for free
How do I save my TurboTax Online return as a tax data file?
After you get the program installed the first thing to do before you open your tax return .tax file is to update the program and install any state programs you had. Then open your file. So you first might need to start a fake return to be able to download the state program (go to FILE - NEW).
You can buy the CD/Download here,
https://turbotax.intuit.com/personal-taxes/cd-download
