CII-SR-454
Syntax rules enforced by XRechnung · severity: error · in EN 16931 (CII) · an error in XRechnung (KoSIT configuration), only a warning in plain EN 16931
Only one ApplicableTradeTax should be present
What it means
Each invoice line may have only one VAT entry (ApplicableTradeTax, BG-30). Split a line with two VAT rates into two lines. XRechnung treats this as an error.
How to fix it
Open the invoice in your invoicing software or XML, correct the fields named in the rule, and check the file again. Our free validator shows exactly where in the file the rule failed. If you need a new compliant invoice, you can create one for free.