SAP Message CA_TTE435 - If TTE and calling system have different BP tax group, check assignment

Diagnosis
The external business partner (BP) tax group &V1& has not beenassigned to a TTE BP tax group. It cannot be mapped for:
Country, tax type: &V2&
System ID1: &V3&

System Response
The system uses the external BP tax group &V1& to determine tax rates.TTE BP tax groups are ignored. If the TTE BP tax groups are differentfrom the external BP tax groups, tax results will contain errors.

Procedure
In Customizing for the TTE, choose
Assign Objects from External Systems.
Choose System ID1: &V3&
Choose BP Tax Group.
Enter data as required.
Choose Save.
To update Customizing settings, choose ImmediateCustomizing Refresh