Diagnosis
The tax type &V1& given in the business partner tax classification withcountry &V2& of business partner &V3& is invalid.

System Response
Tax determination is not possible.

Procedure
The most common reason for this error message is that different tax typecodes are used in TTE and in the business partner tax classification. Toresolve this problem, define a mapping between those tax types in theactivity Assign Objects from External Systems

(Cross-Applications -> Transaction Tax Engine -> Utilities -> AssignObjects from External Systems)
Example: Business partner tax classifications often use tax type "MWST"for value added tax, while TTE uses tax type "VAT".
If the problem cannot be solved with an appropriate mapping, eithercorrect the business partner tax classification or define an appropriatetax type in the TTE configuration via activityDefine Tax Settings
(Cross-Applications -> Transaction Tax Engine -> Tax MaintenanceSettings -> Tax Determination and Calculation -> Define Tax Settings)
To update Customizing settings, choose ImmediateCustomizing Refresh.