Can anyone explain why a product is chained to a single tax class?

To me it would seem that the whole point would be for the product to be applied across many tax classes, dependent on where the buyer is located in relationship to the store. I understand how to build everything, and it all makes sense until I have to nail a product down to one tax class.

It makes me think I need a whole new zencart site for all the rest of the states outside of my own.

I gotta be missing something somewhere. What is it?

(1.3.9)