Why does closing Statistics give the error "Invalid function call. Function reserved for external tax engines only." in Microsoft Dynamics NAV?
Overview
When closing the statistics window for invoices in Dynamics NAV the following error appears:
Invalid function call. Function reserved for external tax engines only.
Page Edit - Sales Order Statistics must close.
Environment
Dynamics NAV
Resolution
- The “Use external Tax engine” box for the Tax Area code.(AvaTax) is checked. We recommend you not check the "Use external Tax engine" check-box for the Tax Area code (AvaTax).