BR-CO-10:Sum of VAT category amounts incorrect
Each VAT category taxable amount must be correctly calculated from line amounts.
Fix this in your source system
MANUALVAT category amounts must match across all line items. Automatic correction could mask data entry errors that need investigation.
See the step-by-step instructions below to fix this error manually.
Why This Error Matters
Invoice rejected. The receiver's system will detect the calculation mismatch during validation.
How to Fix It
Group lines
By TaxCategory ID and Percent
Sum line amounts
Add all LineExtensionAmount for group
Add doc charges
Include document-level charges/allowances for that category
Before & After Fix(BR-CO-10)
Line1: 100.00 + Line2: 200.00 but BT-106 says 350.00Line1: 100.00 + Line2: 200.00 and BT-106 = 300.00Line1: 100.00 + Line2: 200.00 but BT-106 says 350.00Line1: 100.00 + Line2: 200.00 and BT-106 = 300.00Compare the invalid XML structure with the corrected version. The fix ensures compliance with validation rules.
Code Example
<cac:TaxSubtotal>
<cbc:TaxableAmount currencyID="EUR">850.00</cbc:TaxableAmount>
<cbc:TaxAmount currencyID="EUR">178.50</cbc:TaxAmount>
<cac:TaxCategory>
<cbc:ID>S</cbc:ID>
<cbc:Percent>21</cbc:Percent>
</cac:TaxCategory>
</cac:TaxSubtotal>Technical Details
XPath: Sum of /Invoice/cac:TaxTotal/cac:TaxSubtotal/cbc:TaxAmount vs /Invoice/cac:TaxTotal/cbc:TaxAmountCommon Causes
- Sum of line net amounts does not match BT-106
- LineExtensionAmount total calculation mismatch
- Rounding errors accumulated across invoice lines
- Manual adjustment to total without updating lines
- Some lines excluded from sum calculation
Common Causes by Software
Odoo
Why this happens
Rounding differences in multi-currency transactions
How to fix it
Review decimal precision settings in currency configuration
Where to find it
Settings → Technical → Currency → Decimal precisionSage
Why this happens
Tax-inclusive pricing causing calculation mismatches
How to fix it
Ensure consistent tax-inclusive/exclusive settings
Where to find it
Setup → Company Settings → VAT SettingsUsing a different software?
Validate your invoice to get specific fix guidance.
Commonly Seen In
Frequently Asked Questions
See Also
Related Errors
Last updated: 18 January 2026