UBL-CR-486: Leave the tax scheme currency out of discounts and charges

What it means

The VAT category of a discount (BG-20) or charge (BG-21) on the whole invoice has a tax scheme. This rule checks that the scheme has no cbc:CurrencyCode, a UBL element that attaches a currency to the tax scheme. The invoice currency is given at document level (BT-5), not inside this tax scheme. The check applies to invoices and credit notes.

Why it matters

The tax scheme of a document-level discount or charge is not where EN 16931 records the invoice currency or VAT accounting currency.

How to fix it

Delete cbc:CurrencyCode from cac:TaxScheme in the cac:TaxCategory of each cac:AllowanceCharge directly under Invoice or CreditNote. If you need to report VAT in another currency, use the VAT accounting currency code (BT-6) and the invoice total VAT amount in that currency (BT-111) instead. If your invoicing software adds this element, ask its supplier to remove it from the export. Recheck the corrected file.

The rule as published

A UBL invoice should not include the AllowanceCharge TaxCategory TaxScheme CurrencyCode

Where this rule applies