[ic] Trouble with Taxes on checkout page

[Nick Giovas]

I am having trouble with the tax calculation on the checkout page.  When
I configured the system I set the tax rate as 6% for MI.  When I place
an order and type in my address, it pops up a window telling me I will
be charged MI tax of $0.00. No tax is added to my order.  I checked the
preferences on the Admin interface and it says the tax rate is 6.00. 

Any help would be greatly appreciated.

Nick