BR-CO-10
A rule of the European standard EN 16931 – applies to every invoice following the standard, including Peppol BIS Billing 3.0.
What this error means
BR-CO-10
The declared sum of line net amounts (BT-106) does not equal the actual sum of the lines (BT-131).
How to fix it
Recalculate: round each line net amount to 2 decimals first, then add them up — that value goes into LineExtensionAmount at document level.