When running the ‘EvaluationFields’ action the system by default does the following:

• We take Tax ID from Registration ID on the Primary address
• If there is no Registration ID on the Primary address we take Tax exempt number from the counterparty master data
• And we take ISO code from the primary address

This is fine if there is only one address, or the main address is the one used for SII invoices.
Since the system correctly allows to post invoices (Sales and Purchase invoices) for other addresses and VAT numbers different from the one related with Primary address, when the system is retrieving the SII information it should be getting from the invoice and not for the master card.

Due to several reasons, it is not possible to always have the same Primary address as the one used for SII invoices. Once again, with the current system behavior once the action ‘EvaluationFields’ is processed, it will retrieve data from the master card and not the one on the invoice which will lead to incorrect information in SII XML file.

To generate the SII file, the system should get the information (ISO Code, VAT Number) from the invoice.