I am working with WooCommerce plugin and am not able to activate the sales tax calculation. The documentation at WooThemes has been great thus far and I really appreciate this plugin. However, sale tax is not displaying during checkout. I followed their setup instrucitons on this page http://docs.woothemes.com/document/setting-up-taxes-in-woocommerce/
On the tax options page, country, state and rate is specified. zipcode, city both have wildcards.