How to enable self assessed tax for foreign vendors

Summary:

We have a requirement to enable self‑assessed tax only for foreign vendors in Oracle Fusion. Currently, in EBS (the previous system), the client has a rule defined in tax registration where, if the Bill‑From country is not UAE, then the system considers the Bill‑To. Based on this, the self‑assessed tax was working correctly.

I tried to configure the same logic in Fusion, but the system is enabling self‑assessment for all invoices, both foreign and local. How can I enable it only for foreign vendors?

I have completed the following configuration:

Enabled self‑assessed (reverse charge) at the Legal Reporting Unit registration