I'm new to ZenCart and having some issues with state tax. I've setup Texas in Locations/Taxes with 6.25% but when I test the checkout all states are getting taxed. I've been up and down all the Admin tools. What am I missing to get this corrected?

I've also tried to add United States in the Zone Definitions but that caused all the states to get a message - "do not sell in my area".

Any help to get this resolved quickly is appreciated!