Hello. I'm a newbie.  First time poster. 

I need to set up my taxes so I only charge sales tax on one state.  But the instructions aren't proving to be very helpful.

Do I create a location for this state, then a Tax Class for this state?

OR

Do i choose Location=USA, unselect "all location zones" and pick my state from the from the drop-down? 

FWIW, when I test, I don't see sales tax calculating and/or showing up in the checkout experience.

Thank you for your help!!