How about this handy little search feature, when trying to figure out if your client should be paying sales tax or not:
If they aren’t even listed in the database and are based in Texas, they have no way to avoid paying state sales tax on your photo shoot. If they ARE listed, they need to meet one of the other qualifiers, as well – like the photos will be incorporated into their product, which they will be selling.
Collect sales tax and pay it into the state every January. As a professional photographer, you are required to by law!