From 41757254d62c4b39fd773cebb6101d7e3102442e Mon Sep 17 00:00:00 2001
From: Matt-Yorkley <9029026+Matt-Yorkley@users.noreply.github.com>
Date: Mon, 28 Jun 2021 15:35:01 +0100
Subject: [PATCH] Recalculate taxes when an order's customer details are
 changed

---
 .../spree/admin/orders/customer_details_controller.rb  | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/app/controllers/spree/admin/orders/customer_details_controller.rb b/app/controllers/spree/admin/orders/customer_details_controller.rb
index 3b25a16671..5b4806c815 100644
--- a/app/controllers/spree/admin/orders/customer_details_controller.rb
+++ b/app/controllers/spree/admin/orders/customer_details_controller.rb
@@ -26,6 +26,7 @@ module Spree
             end
 
             refresh_shipment_rates
+            recalculate_taxes
             OrderWorkflow.new(@order).advance_to_payment
 
             flash[:success] = Spree.t('customer_details_updated')
@@ -47,6 +48,15 @@ module Spree
           @order.shipments.map(&:refresh_rates)
         end
 
+        def recalculate_taxes
+          # If the order's address has been changed, the tax zone could be different,
+          # which means a different set of tax rates might be applicable.
+          @order.create_tax_charge!
+          Spree::TaxRate.adjust(@order, @order.adjustments.admin)
+
+          @order.updater.update_totals_and_states
+        end
+
         def order_params
           params.require(:order).permit(
             :email,