Marketpress Location Tax cookie?

So I wanted to show my client how the base tax rate only applies to CA orders…

Opened up Safari…put in a CA address, at the paypal screen it shows the tax and shipping…which is what we want…

Then I wanted to show what happens if another state is entered…so I reset safari, cleared the cache, opened site, clicked add to cart and it displayed the shipping and tax before I entered anything in there…and when I went to checkout…all the previous stuff was there…

where does it store that info? thought it would be cleared when I did a Reset and cleared the cache?

Should add that once I put in the new non CA info…it started working. Just curious why the cache clear and reset didn’t clear it out.

Cheers,