EBTax - Importing a XML file with no tax code at the supplier Site

Hi,

I am trying to Import a XML file through AP open interface.  The invoice in the file is matched to a Purchase order and the tax code should be triggered from the Purchase Order.  Unfortunately when running the Payables import programm falls with an error as Tax code is missing.

The workaround is to set the "Application tax options"  in EBTax and default for standard invoice the supplier site.  So the setup for the "Application tax Options" at operating Unit is:

1: Reference document

2. Supplier Site

Is there a way that the import program is not requiring any tax code set at Supplier site level and only takes the purchase Order tax code.