BR-E-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-E-10
A VAT breakdown marked 'Exempt from VAT' has no exemption reason (code BT-121 or text BT-120).
How to fix it
Add TaxExemptionReason with the legal basis, e.g. the article of the VAT law, or the corresponding reason code.