AGIS Payables invoice failing

We currently are setting up AGIS between our Irish and UK divisions. We have two separate ledgers and two separate operating units.

The intercompany process itself is working fine. We are able to generate an AR invoice in receivables and we are able to import the invoice into payables. Our issue is that we cannot validate the invoice in AP. We are getting a tax error.

We think that the issue is that the system is trying to apply the IE VAT regime (source of invoice Ireland) instead of the destination GB VAT regime.

Please note that a zero rate of VAT is being applied to the invoices.