Diagnosis
Two or more external tax types have been assigned to one internal taxtype.

System Response

Procedure
In Customizing for the TTE:
Choose Assign Objects From External Systems
Select the relevant external system: System ID1 &V3&, country &V2& andTax Type Assignment for tax type &V2&.
Adjust the assignments so that each external tax group has a uniqueassignment to an internal tax group.
Choose Save.
For an immediate Customizing update, executeImmediate Customizing Refresh.