Why can’t I select Texas as the state I want to fill in

Texas doesn't have a state income tax. If you live in and work in Texas and unless you own an business in Texas then you do not have to file an income tax return.

I worked in Texas for two months and I have a w-2, but Texas isn’t on the list of states. And turbo tax wants a state entered. What do I do.

Texas does not have an income tax. Leave W2 boxes 15-17 Blank. 

I’m trying, but I cannot continue unless I add something 

Doh! Figured it out, couldn’t see the forest because of the trees in the way.