Tax Rates

Go to the System → Localization → edit Tax Class → Tax rates

Tax Rates can be added only within some Tax Class.

When specifying the tax rate, you will see the following screen

Location	select specific Location (New Location can be added in the System → Localization → Locations)
Location's zone	If this rate will only apply to a specific state (or other Location's Zone designation) uncheck 'all location zones' and then locate the state (or Location Zone). (New Zones can be added in the System → Localization → Zones)
Description	Description of the Tax Rate. You can define this as anything you like.
Tax Rate	Tax rate can be set to either PERCENTAGE or ABSOLUTE AMOUNT in store's default currency. You can designate this under the drop-down menu.
Tax Apply Condition	Apply this tax only if, a taxed amount (product, shipping, subtotal, etc.) corresponds to the condition.
Exempt Groups	Select Customer's Groups to exempt this rate.
Priority	Set the priority of the tax rate. This will determine which tax rate will be used if tax rate location overlaps other.

Test Taxes

Be sure to make test purchases with a fake customer account from each Location to be sure tax is set up correctly! Add a product to cart, and try to change the delivery address to a different state or country.