How to configure Bulgaria Protocol for SAFT Reporting

We are looking to implement the generation of Bulgarian VAT protocols in Oracle. A VAT protocol is a self‑issued internal document required for reverse charge VAT reporting on purchases from non‑Bulgarian/foreign suppliers.

We considered manually creating the protocol as a separate “invoice” in Oracle; however, this is not workable because the supplier invoice is already posted in AP to recognise the expense. Creating a protocol as another invoice would introduce additional accounting and could double‑post the cost. We need the protocol to drive reverse charge VAT only (output VAT and input VAT), linked to the original vendor invoice, without duplicating the expense and without creating any payment or AP ageing impact.