SAP Message CA_TTE478 - Country &1 for tax classification of business partner &2 is invalid

System Response
Tax determination is not possible.

Procedure
In the input document choose the relevant Business Partner. Inthe sub-screen Business Partner Tax Classification, enter thecountry.
To view the defined countries, check the Customizing activities inDefine Tax Location
(Cross-Applications -> Transaction Tax Engine -> Tax MaintenanceSettings -> Tax Location -> Define Tax Location)