PEPPOL-EN16931-R040: An allowance or charge gives both a base amount and a percentage, but the…
What it means
An allowance or charge gives both a base amount and a percentage, but the amount does not equal base amount x percentage / 100.
How to fix it
Recompute the allowance/charge amount as base amount x (percentage / 100) and re-issue. Arithmetic mismatch -- reported, never auto-repaired.