UBL-SR-48
Invoice lines shall have one and only one classified tax category.
What does this rule mean?
Invoice lines shall have one and only one classified tax category.
A syntax rule binding the EN 16931 requirements to the concrete XML syntax (UBL or CII).
Official rule message (standard)
Invoice lines shall have one and only one classified tax category.
Where the rule applies
Syntax: UBL
Affected element (XPath):
cac:InvoiceLine | cac:CreditNoteLine
Technical test
The rule passes when this Schematron expression holds true:
count(cac:Item/cac:ClassifiedTaxCategory) = 1How to fix it
A missing or incorrect business entry only you can supply. Add or correct it, then re-check.
Adjust the named element/attribute to the syntax requirement.
Correct the affected entry in your XML, then re-check the invoice. Validation runs locally in your browser — your file never leaves your machine.
Check an e-invoice here
Drop an XML or ZUGFeRD PDF file here. Validation runs locally in your browser against EN 16931 — your file never leaves your machine.