Do you want to use the Desktop program again this year? They are only selling it as a download this year instead of the CD. It will be the same program that you are used to.
Where did you buy it before? You can buy Turbo Tax at several stores like Costco, Sam’s, etc. Where can I buy Turbo Tax Desktop program?
https://ttlc.intuit.com/community/choosing-a-product/help/where-can-i-buy-the-turbotax-software/00/25893
You can buy the Desktop Download program directly from Turbo Tax here,
https://turbotax.intuit.com/personal-taxes/cd-download/
THEN How to install and Activate the Desktop CD/Download program with a License Code
How to install TurboTax CD/Download software with license code