How is the amount of tax determined?

Tax is charged for orders shipped to U.S. states, protectorates and territories where sales taxes are applicable. Items sent to APO / FPO military addresses are not subject to taxes. The amount of tax charged is based on current tax rates. Tax will be refunded for returned items.
Before placing order, you can check the tax rate which will be applied to your order through following procedures:
   Add the items to your cart--check out--select your state--update, then you can see the tax rate.