QAD 2017 Enterprise Edition > User Guides > Global Tax Management > Introduction to Global Tax Management > Overview > Considerations
  
Considerations
GTM does not currently support unit-based taxes, such as $0.05 per can of soda.
GTM does not calculate taxes on distribution orders generated by the Distribution Requirements Planning (DRP) module. In this situation, generate sales orders instead of distribution orders.
GTM does not adjust sales commission reporting. Commissions are always based on item prices including tax. Adjust your commission structure to compensate.