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A practical architecture has six layers:

The treatment depends on the invoice type. Standard tax invoices generally require clearance before they are considered valid for the applicable transaction, while simplified tax invoices follow a reporting process. The business should configure its workflow according to the current ZATCA requirements for each document type.

AI can extract invoice information, classify documents, and identify likely tax scenarios, but it should not replace deterministic validation. XML schema checks, tax calculations, QR verification, signature checks, and submission controls should be enforced by rules and tested integrations.