For a B2B Export case, even though the Postal Zone is optional but when value is not passed then it is giving the below warning.
“WarningList”: [
{
"ErrorCode": "BR-10",
"ErrorMessage": "An Invoice shall contain the Buyer postal address (BG-8).Not applicable for simplified tax invoices and associated credit notes and debit notes (KSA-2, position 1 and 2 = 02).",
"ErrorSource": "ZATCA"
}
\],