diff --git a/assets/js/admin/meta-boxes-order.js b/assets/js/admin/meta-boxes-order.js
index 25362b919a2..2b4e8df9906 100644
--- a/assets/js/admin/meta-boxes-order.js
+++ b/assets/js/admin/meta-boxes-order.js
@@ -384,13 +384,13 @@ jQuery( function ( $ ) {
 			if ( value != null ) {
 				wc_meta_boxes_order_items.block();
 
-				var data = {
+				var data = $.extend( {}, wc_meta_boxes_order_items.get_taxable_address(), {
 					action   : 'woocommerce_add_coupon_discount',
 					dataType : 'json',
 					order_id : woocommerce_admin_meta_boxes.post_id,
 					security : woocommerce_admin_meta_boxes.order_item_nonce,
 					coupon   : value
-				};
+				} );
 
 				$.post( woocommerce_admin_meta_boxes.ajax_url, data, function( response ) {
 					if ( response.success ) {
@@ -411,13 +411,13 @@ jQuery( function ( $ ) {
 			var $this = $( this );
 			wc_meta_boxes_order_items.block();
 
-			var data = {
+			var data = $.extend( {}, wc_meta_boxes_order_items.get_taxable_address(), {
 				action : 'woocommerce_remove_order_coupon',
 				dataType : 'json',
 				order_id : woocommerce_admin_meta_boxes.post_id,
 				security : woocommerce_admin_meta_boxes.order_item_nonce,
 				coupon : $this.data( 'code' )
-			};
+			} );
 
 			$.post( woocommerce_admin_meta_boxes.ajax_url, data, function( response ) {
 				if ( response.success ) {
diff --git a/includes/class-wc-ajax.php b/includes/class-wc-ajax.php
index 2ba970ab370..1e7bcad99c6 100644
--- a/includes/class-wc-ajax.php
+++ b/includes/class-wc-ajax.php
@@ -1076,14 +1076,24 @@ class WC_AJAX {
 		$response = array();
 
 		try {
-			$order_id = absint( $_POST['order_id'] );
-			$order    = wc_get_order( $order_id );
-			$result   = $order->apply_coupon( wc_clean( $_POST['coupon'] ) );
+			$order_id           = absint( $_POST['order_id'] );
+			$order              = wc_get_order( $order_id );
+			$calculate_tax_args = array(
+				'country'  => strtoupper( wc_clean( $_POST['country'] ) ),
+				'state'    => strtoupper( wc_clean( $_POST['state'] ) ),
+				'postcode' => strtoupper( wc_clean( $_POST['postcode'] ) ),
+				'city'     => strtoupper( wc_clean( $_POST['city'] ) ),
+			);
+
+			$result = $order->apply_coupon( wc_clean( $_POST['coupon'] ) );
 
 			if ( is_wp_error( $result ) ) {
 				throw new Exception( html_entity_decode( wp_strip_all_tags( $result->get_error_message() ) ) );
 			}
 
+			$order->calculate_taxes( $calculate_tax_args );
+			$order->calculate_totals( false );
+
 			ob_start();
 			include 'admin/meta-boxes/views/html-order-items.php';
 			$response['html'] = ob_get_clean();
@@ -1108,10 +1118,18 @@ class WC_AJAX {
 		$response = array();
 
 		try {
-			$order_id = absint( $_POST['order_id'] );
-			$order    = wc_get_order( $order_id );
+			$order_id           = absint( $_POST['order_id'] );
+			$order              = wc_get_order( $order_id );
+			$calculate_tax_args = array(
+				'country'  => strtoupper( wc_clean( $_POST['country'] ) ),
+				'state'    => strtoupper( wc_clean( $_POST['state'] ) ),
+				'postcode' => strtoupper( wc_clean( $_POST['postcode'] ) ),
+				'city'     => strtoupper( wc_clean( $_POST['city'] ) ),
+			);
 
 			$order->remove_coupon( wc_clean( $_POST['coupon'] ) );
+			$order->calculate_taxes( $calculate_tax_args );
+			$order->calculate_totals( false );
 
 			ob_start();
 			include 'admin/meta-boxes/views/html-order-items.php';