Reason why Document Fiscal Classifications not working for one of the LE under the same BU

Summary: We have foreign registrations and using the Document Fiscal Classifications to enable tax based on the location or the country of our supplier. Case is for one (1) Business Unit we have 2 legal entities and both of this Legal Entities will have foreign tax, situation below:

Data: The Business Unit is ABC. ABC has 2 Legal Entities , LE1 and LE2.

Document Fiscal Classifications 1 : XX in NL ( this is for LE1 )

Document Fiscal Classifications 2: XX in Spain ( this is for LE2 )

LE1 creates AP invoices and supplier is located in Netherlands , for this case during AP invoice creation we used the document fiscal classification-XX in NL and the tax rate that is applied on the AP invoices is NL tax rates which is correct .