Ultra Commerce uses the concept of tax categories to define unique taxation rates for customers who order from states or countries with differing tax laws. A tax category has two components, then: the area being taxed, and the percentage of the order taxed.
To access the Tax Category Listing, select "Tax Categories" from the Settings Manager.
From here, you can edit or view existing tax categories, or begin creating a new one by clicking the orange + Add Tax Category button. You will be prompted to toggle active status and input Tax Category Name.
On the Tax Category detail page, you will need to add at least one Tax Category Rate by clicking the black + Add Tax Category Rate button. This will prompt you to input a percentage for the tax rate and select the Address Zone to which the rate applies (for more on this, consult the Address Zones section of the guide).