BR-KSA-EN16931-08
Only one tax total (BG-22) with tax subtotals must be provided.Refer to Calculation of VAT.
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.
/ubl:Invoice
count(./cac:TaxTotal[cac:TaxSubtotal]) = 1
Checked with Saudi Arabia ZATCA Tax Invoice (UBL), Saudi Arabia ZATCA Simplified Tax Invoice (UBL)