From 261895a5079569bfbaf1511bc4e6df62996ad144 Mon Sep 17 00:00:00 2001
From: Frank Schubert <fronk@fronk.at>
Date: Tue, 12 Aug 2025 13:43:56 +0200
Subject: [PATCH] Billing: Treat Contract as domestic if b-address has UID
 starting with ATU

---
 application/Billing/BillingController.php | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/application/Billing/BillingController.php b/application/Billing/BillingController.php
index 8a3512115..0425519d3 100644
--- a/application/Billing/BillingController.php
+++ b/application/Billing/BillingController.php
@@ -518,6 +518,10 @@ class BillingController extends mfBaseController {
                     $vatarea = "other";
                 }
 
+                if(substr(strtolower(preg_replace('/[^a-z0-9]/i', "", $billingaddress->uid)), 0, 3) == "atu") {
+                    $vatarea = "domestic";
+                }
+
                 $data["country"] = $billcountry->name;
                 $data["vatrate"] = $vatgroup->rates[$vatarea]->rate;
                 $data["vatgroup_id"] = $contract->vatgroup_id;