From 47c370809e51b826230920367de414eb0eca5d57 Mon Sep 17 00:00:00 2001
From: Claudio Sanches <contato@claudiosanches.com>
Date: Fri, 7 Jun 2019 10:06:03 -0300
Subject: [PATCH 1/2] Prevents taxes columns from being removed when the order
 is no longer editable

---
 includes/admin/meta-boxes/views/html-order-items.php | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/includes/admin/meta-boxes/views/html-order-items.php b/includes/admin/meta-boxes/views/html-order-items.php
index 7cfe3093d8c..04434aeccd8 100644
--- a/includes/admin/meta-boxes/views/html-order-items.php
+++ b/includes/admin/meta-boxes/views/html-order-items.php
@@ -43,7 +43,9 @@ if ( wc_tax_enabled() ) {
 						<th class="line_tax tips" data-tip="<?php echo esc_attr( $column_tip ); ?>">
 							<?php echo esc_attr( $column_label ); ?>
 							<input type="hidden" class="order-tax-id" name="order_taxes[<?php echo esc_attr( $tax_id ); ?>]" value="<?php echo esc_attr( $tax_item['rate_id'] ); ?>">
-							<a class="delete-order-tax" href="#" data-rate_id="<?php echo esc_attr( $tax_id ); ?>"></a>
+							<?php if ( $order->is_editable() ) : ?>
+								<a class="delete-order-tax" href="#" data-rate_id="<?php echo esc_attr( $tax_id ); ?>"></a>
+							<?php endif; ?>
 						</th>
 						<?php
 					endforeach;

From 9212ee50827f0978b2c87e522aa09db914fa9cfc Mon Sep 17 00:00:00 2001
From: Gerhard <potgieterg@gmail.com>
Date: Thu, 20 Jun 2019 15:01:01 +0200
Subject: [PATCH 2/2] Add check before calling wc_delete_order_item for taxes
 to make sure order is editable.

---
 includes/class-wc-ajax.php | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/includes/class-wc-ajax.php b/includes/class-wc-ajax.php
index 1a3eb294814..8d8dcca4526 100644
--- a/includes/class-wc-ajax.php
+++ b/includes/class-wc-ajax.php
@@ -1322,8 +1322,14 @@ class WC_AJAX {
 			$order_id = absint( $_POST['order_id'] );
 			$rate_id  = absint( $_POST['rate_id'] );
 
+			$order = wc_get_order( $order_id );
+			if ( ! $order->is_editable() ) {
+				throw new Exception( __( 'Order not editable', 'woocommerce' ) );
+			}
+
 			wc_delete_order_item( $rate_id );
 
+			// Need to load order again after deleting to have latest items before calculating.
 			$order = wc_get_order( $order_id );
 			$order->calculate_totals( false );