F-LIB385

TaxAmount of '…' must equal the sum of all following TaxSubtotal/TaxAmount '…'

error: the document is invalid

What the rule checks

As the rule set's publisher wrote it. The rule runs on every element the context matches, and fails where the test is false; the validator reports the line of that element.

Test
(xs:decimal(child::cbc:TaxAmount) = round((sum(cac:TaxSubtotal/xs:decimal(cbc:TaxAmount)) * 10 * 10)) div 100) or not(cac:TaxSubtotal)

Checked with Denmark OIOUBL 2.1 Invoice