PEPPOL-EN16931-R120
An official OpenPeppol BIS Billing 3.0 rule – checked for invoices sent over the Peppol network on top of the EN 16931 rules.
What this error means
PEPPOL-EN16931-R120
An invoice line's net amount does not equal quantity × (unit price / price base quantity) + line charges − line allowances.
How to fix it
Recalculate the line: LineExtensionAmount = quantity × unit price (per base quantity) + charges − allowances, rounded to 2 decimals.