Sales tax is collected for all orders shipped within the states of California and Washington.
Tax is based on tax rates for your county and city by zip code (derived from the ship-to address being used for the order). Tax is calculated at the item-level.
Tax is also applied to the shipping charges associated to the taxable items in your order. If you return an item for a refund, you will also receive a refund for the taxes you paid for that item. You will not receive a refund for the taxes you paid on the shipping of that item, as the shipping charges are nonrefundable once an item has indeed been shipped.