Why is my transaction not coming from Epicor to the admin console?

Overview

We have a transaction that is not showing in the admin console but is in Epicor, it will not post.

Avalara Avatax

Epicor

Please be sure that all the addresses for an invoice are complete and have a country and region.

Without this, it will error on our side when the call is made to the Avatax engine and not post through Epicor.