BR-CO-10
The sum of invoice line net amounts (BT-106) must equal the sum of the individual line net amounts (BT-131) exactly.
- Severity
- Error
- Applies to
- CII, UBL
- Rule set
- v2026-01-31
Official rule text
Sum of Invoice line net amount (BT-106) = Σ Invoice line net amount (BT-131).
Why it happens
This appears when line amounts are rounded individually and then added, while the total is computed from unrounded values. The two routes disagree.
How to fix it
Round each line amount to two decimal places and sum exactly those rounded values, not the raw ones.
NormAPI provides technical validation, not tax or legal advice.