Validation rules
NB-VAT-RATE
A line has neither a VAT rate nor a VAT category — the category cannot be determined.
- Rule
NB-VAT-RATE— normbill pre-flight check (no single official rule id applies)- Severity
- error
- Business term
BT-152— Line VAT rate- Field in your JSON
invoice.lines[*].vat
How to fix it
Set line.vat (e.g. 19) or an explicit line.vat_category.
NB-VAT-RATE auf Deutsch — was bedeutet der Fehler?
Eine Position hat weder einen Umsatzsteuersatz noch eine Umsatzsteuer-Kategorie — die Kategorie lässt sich nicht bestimmen.
So beheben Sie den Fehler
Setzen Sie line.vat (z. B. 19) oder explizit line.vat_category.
NB-* checks run before generation to catch problems the official rule set would only report indirectly. The authoritative KoSIT validation still has the final word on conformance.
Official sources
- XRechnung specification (KoSIT / xeinkauf.de)
- KoSIT validator on GitHub and the XRechnung validator configuration
Every 422 from the API lists the rule id, the path in your request JSON, a plain-language message and a suggested fix — see the docs overview for the report format.