You can always start with the simplest version and if you need an upgrade, Turbo Tax will tell you. The biggest change is the number of people who have itemized in the past and are not this year since the standard deduction is so much bigger.
You can compare the programs here:
https://turbotax.intuit.com/personal-taxes/compare/online/
Here is some information about the tax reform:
https://ttlc.intuit.com/replies/6971774