There are two different ways that taxes can be calculated in Teesom:
1.) Sales Tax On Order
In this system, a Tax Code which specifies a percentage tax rate is set on the whole order, and then each row on the order can be set to be either Taxable or Non-taxable.
2.) Sales Tax Per Line On Order
In this system, the order is either set to Taxable or Non-taxable, and then each row on the order can be set to a different percent tax rate.
You can select which tax system to use under Company Setup:
VERY IMPORTANT: Once the tax system is selected, it can NOT be changed later!