The Online version you have to use is based on what you need to enter. So start in Deluxe and if you try to enter something that Deluxe doesn't have you will have to upgrade to Premium. In the Turbo Tax Free Edition, information that you can enter is limited now. Why do I have to upgrade from the Free Edition?
https://ttlc.intuit.com/community/upgrading/help/why-do-i-have-to-upgrade-from-free-edition/00/26379
Plus the Online versions are only good for 1 return per account. State is a separate charge. You only can see the forms after you pay and download the pdf. And you might need to upgrade to a higher version to enter different kinds of income.
DESKTOP
The Download Desktop program you buy and install the program on a full Windows or Mac computer (a desktop or laptop), which can do unlimited returns. And you can buy any version like just Deluxe. All the Desktop programs have all the forms, you just get more help in the higher versions. And the Desktop program has many other features over the Online versions. Like seeing and entering into the actual forms. And it has a What-If worksheet to test in.
In Desktop, You get 5 federal efile for free. In Deluxe and above you get 1 free state PROGRAM download to prepare unlimited state returns (in that state). Each state return including the first one is $20 early or $25 (March 1) to efile or you can print and mail the state for free.
You can buy the personal Desktop Download program here,
https://turbotax.intuit.com/personal-taxes/cd-download
