Hi @gumabs 

could you please let me know which app version are you asking for ?
There are several rules and it may work differently depending on app version.
For example, in the APP9 it looks like below:

Fields <KodKrajuNadaniaTIN> (Country of tax number) and NrKontrahenta/NrDostawcy ((Tax) Number of Customer/Supplier) should be handled as follows:

• Fetch Tax ID Number as today:
  • Fetch Tax ID Number from Tax Transactions window.
  • In case of document from customs, it will be replaced by Tax Id Number of supplier from invoice reference stated in General Invoice Info.
  • In case of transaction without Party Type/Identity fetch company Tax ID Number.
• Remove all characters from Tax ID Number other than letters and digits.
• If Tax ID Number is empty, <KodKrajuNadaniaTIN> should be empty and <NrKontrahenta>/<NrDostawcy> should have value ‘BRAK’.

• Otherwise fetch Invoice Address ID from Tax Transactions window. In case of document from customs, use address of supplier from invoice reference stated in General Invoice Info.
  • If column has no value and party type is Customer and invoice reference exists on tax transaction, fetch document address from this invoice.
  • If column has no value and party type is Supplier and invoice reference exists on tax transaction, fetch document address from this invoice.
  • If column has no value and party type is Customer and no invoice reference, fetch default address of type ‘Document’ for customer from Identity field.
  • If column has no value and party type is Supplier and no invoice reference, fetch default address of type ‘Document’ for supplier from Identity field.
• Otherwise, set <KodKrajuNadaniaTIN> to ‘PL’ and <NrKontrahenta>/<NrDostawcy> should have value of Tax ID Number, but without ‘PL’ prefix (Company Tax ID scenario).
• Fetch Country from Customer/Address/General Info or Supplier/Address/General Info respectively. <KodKrajuNadaniaTIN> should be set to selected country. <NrKontrahenta>/<NrDostawcy> should have value of Tax ID Number, but without country prefix stored <KodKrajuNadaniaTIN>.

Best regards,
Małgorzata

Hello Gosia @Malgorzata Palatynska ,

This is application 10 update 14. Tax code we are using IU23 (Calculate Tax). I checked the transactions and this is regular invoice (not a custom document). There is invoice address ID.

According to your reply, the KodKrajuNadaniaTIN field should be fetched from supplier address.  Am I missing something?

Another question related to WEW and SAD documents. Do you have any descriptive user document how to enter SAD and WEW documents?

Thank you for help