[IBR-059-OM] - The source currency must be designated as the invoice currency code (IBT-005), and the target currency must be specified as the tax accounting currency (IBT-006), provided that the currency exchange rate (BTOM-003) is available.
IBR-059-OMubl:Invoice | cn:CreditNotenot($exchangeRate) or (cac:TaxExchangeRate/cbc:SourceCurrencyCode=$invoiceCurrency and cac:TaxExchangeRate/cbc:TargetCurrencyCode=$taxCurrency)