A couple of questions: 1) When I set a "Special Tax Rate"

A couple of questions:

1) When I set a "Special Tax Rate" for a product, it does not display on any of the checkout pages. I have the state Tax Rate set to 0 in the Store Settings. Is this an error or am missing a setting somewhere?

2) Is MarketPress compatible with WP Version 3.7.1?

Thanks in advance for your guidance.

Merv (lzw8bk)