INVOICE ERROR GUIDE

Fix BR-CO-10: line totals do not add up.

BR-CO-10 checks that the invoice line extension amount equals the sum of the line net amounts. It is a calculation consistency rule: the amount is before VAT and before document-level allowances or charges.

A small before-and-after example

Invoice lines	Before	After
Line 1 · 2 × €40.00	€80.00	€80.00
Line 2 · 1 × €15.00	€15.00	€15.00
Sum of line net amounts	€95.00	€95.00
`LegalMonetaryTotal/LineExtensionAmount`	€100.00	€95.00

Before: the document declares a line-extension total of €100.00, but its lines sum to €95.00, so BR-CO-10 fails. After: set the line-extension total to €95.00. Document-level charges and allowances belong in their own totals.

What to check in UBL

Sum every InvoiceLine/LineExtensionAmount after applying each line's quantity and price.
Compare that sum with LegalMonetaryTotal/LineExtensionAmount.
Keep currency identifiers consistent and use decimal arithmetic. EN16931 line net amounts allow at most two decimals.
Recheck related totals such as tax-exclusive amount and payable amount after correcting the line total.

ApiVect reports stable rule codes and validation stages. A BR-CO-10 finding does not by itself say anything about VAT registration or tax treatment.

Validate a private invoice ↗ Read the Invoice API