Note: Service tax categories that are in use (e.g. configured on services and tax codes) cannot be deleted. In order to delete a service tax category that is in use, first check the References tab to determine what entities are configured to use the service tax category that you wish to delete and then change those entities to use an alternate service tax category.
Under the Service Tax Categories heading on the left select the service category you wish to delete
Under the same Service Tax Categories heading click the icon
On the confirmation dialog that appears select Yes