You can buy any of the Desktop CD/Download programs you can use any version. All the Desktop programs have the same forms. You just get more help and guidance in the higher versions.
If you use the Online web version start with Deluxe. It will ask you to upgrade if you need a higher version.
Desktop vs Online
https://ttlc.intuit.com/community/choosing-a-product/help/what-s-the-difference-between-turbotax-onl...
Start an Online return here,
https://turbotax.intuit.com/personal-taxes/online/
Buy the personal Desktop CD/Download programs here
https://turbotax.intuit.com/personal-taxes/cd-download/
