BR-CO-18 error
What this rule checks
Explanation
Every invoice must contain at least one VAT breakdown group (BG-23) — the block that reports a taxable amount, tax amount, category, and rate for each VAT category used on the invoice. This is a presence check; it doesn't check whether the breakdown's figures are correct (that's BR-CO-14/17 and the BR-S/Z/E/AE family).
How to fix it
Add at least one VAT breakdown group (UBL: cac:TaxSubtotal under TaxTotal; CII: ram:ApplicableTradeTax under ApplicableHeaderTradeSettlement) with its category code, taxable amount, and tax amount populated.
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