Login to your Online Dashboard
Choose "Assortment" > "Taxes" from the left-side column

Click the "+ Add tax" button

A blank tax window will appear, fill it out with your desired information and click "Save" when finished

Login to your Online Dashboard
Choose "Assortment" > "Taxes" from the left-side column
Click the "+ Add tax" button
A blank tax window will appear, fill it out with your desired information and click "Save" when finished