The KampData TaxEngine was designed to behave similarly to Microsoft Dynamics GP in regard to order entry and tax calculation. The following steps detail the minimum requirements for tax calculation.
NOTE: When setting the DocCustomerID property, the DocDefaultShipToAddressID property or when calling the DocTaxScheduleSelect method, the Tax Schedule ID might not originate from the customer's address record. Please see Tax Location for more information.
Handling Tax Exempt Customers or Item Taxability