Administradors can setup the taxes and any additional charge exception needed to setup for a specific customer.To add the tax for a specific customer refer to Customer Setup.
Instuctions
Follow these steps:
Go to Setup > Settings > CompanySetup.
Click on the "Tax" link.
The Tax Settings window will pop up, enable the tax by clicking on the check box.
If needed you can "Add new tax" to the list.
Put in a "Name" and "Percentage", click on Save.
You can "Edit" or "Delete" a tax located under the Actions column.