diff --git a/includes/class-wc-checkout.php b/includes/class-wc-checkout.php
index f8e60d6f5df..63007928cf4 100644
--- a/includes/class-wc-checkout.php
+++ b/includes/class-wc-checkout.php
@@ -370,7 +370,7 @@ class WC_Checkout {
 			 * Action hook to adjust item before save.
 			 * @since 2.7.0
 			 */
-			do_action( 'woocommerce_checkout_create_order_line_item', $item, $cart_item_key, $values );
+			do_action( 'woocommerce_checkout_create_order_line_item', $item, $cart_item_key, $values, $order );
 
 			// Add item to order and save.
 			$order->add_item( $item );
@@ -401,7 +401,7 @@ class WC_Checkout {
 			 * Action hook to adjust item before save.
 			 * @since 2.7.0
 			 */
-			do_action( 'woocommerce_checkout_create_order_fee_item', $item, $fee_key, $fee );
+			do_action( 'woocommerce_checkout_create_order_fee_item', $item, $fee_key, $fee, $order );
 
 			// Add item to order and save.
 			$order->add_item( $item );
@@ -437,7 +437,7 @@ class WC_Checkout {
 				 * Action hook to adjust item before save.
 				 * @since 2.7.0
 				 */
-				do_action( 'woocommerce_checkout_create_order_shipping_item', $item, $package_key, $package );
+				do_action( 'woocommerce_checkout_create_order_shipping_item', $item, $package_key, $package, $order );
 
 				// Add item to order and save.
 				$order->add_item( $item );
@@ -467,7 +467,7 @@ class WC_Checkout {
 				 * Action hook to adjust item before save.
 				 * @since 2.7.0
 				 */
-				do_action( 'woocommerce_checkout_create_order_tax_item', $item, $tax_rate_id );
+				do_action( 'woocommerce_checkout_create_order_tax_item', $item, $tax_rate_id, $order );
 
 				// Add item to order and save.
 				$order->add_item( $item );
@@ -493,7 +493,7 @@ class WC_Checkout {
 			 * Action hook to adjust item before save.
 			 * @since 2.7.0
 			 */
-			do_action( 'woocommerce_checkout_create_order_coupon_item', $item, $code, $coupon );
+			do_action( 'woocommerce_checkout_create_order_coupon_item', $item, $code, $coupon, $order );
 
 			// Add item to order and save.
 			$order->add_item( $item );
diff --git a/includes/class-wc-order-item-tax.php b/includes/class-wc-order-item-tax.php
index db5d2dfae13..3eac790da8f 100644
--- a/includes/class-wc-order-item-tax.php
+++ b/includes/class-wc-order-item-tax.php
@@ -104,10 +104,12 @@ class WC_Order_Item_Tax extends WC_Order_Item {
 	 * @throws WC_Data_Exception
 	 */
 	public function set_rate( $tax_rate_id ) {
+		$tax_rate = WC_Tax::_get_tax_rate( $tax_rate_id, OBJECT );
+
 		$this->set_rate_id( $tax_rate_id );
-		$this->set_rate_code( WC_Tax::get_rate_code( $tax_rate_id ) );
-		$this->set_label( WC_Tax::get_rate_code( $tax_rate_id ) );
-		$this->set_compound( WC_Tax::get_rate_code( $tax_rate_id ) );
+		$this->set_rate_code( WC_Tax::get_rate_code( $tax_rate ) );
+		$this->set_label( WC_Tax::get_rate_label( $tax_rate ) );
+		$this->set_compound( WC_Tax::is_compound( $tax_rate ) );
 	}
 
 	/*
diff --git a/includes/class-wc-product-variable.php b/includes/class-wc-product-variable.php
index 5333c604e33..4d1e462361c 100644
--- a/includes/class-wc-product-variable.php
+++ b/includes/class-wc-product-variable.php
@@ -67,9 +67,7 @@ class WC_Product_Variable extends WC_Product {
 	 * @return array() Array of RAW prices, regular prices, and sale prices with keys set to variation ID.
 	 */
 	public function get_variation_prices( $include_taxes = false ) {
-		$data_store = $this->get_data_store();
-
-		$prices = $data_store->read_price_data( $this, $include_taxes );
+		$prices = $this->data_store->read_price_data( $this, $include_taxes );
 
 		foreach ( $prices as $price_key => $variation_prices ) {
 			$prices[ $price_key ] = $this->sort_variation_prices( $variation_prices );
diff --git a/includes/class-wc-tax.php b/includes/class-wc-tax.php
index 036b41b3a8e..c8dcb9259f8 100644
--- a/includes/class-wc-tax.php
+++ b/includes/class-wc-tax.php
@@ -594,12 +594,21 @@ class WC_Tax {
 	/**
 	 * Return true/false depending on if a rate is a compound rate.
 	 *
-	 * @param   int		key
+	 * @param mixed $key_or_rate Tax rate ID, or the db row itself in object format
 	 * @return  bool
 	 */
-	public static function is_compound( $key ) {
+	public static function is_compound( $key_or_rate ) {
 		global $wpdb;
-		return $wpdb->get_var( $wpdb->prepare( "SELECT tax_rate_compound FROM {$wpdb->prefix}woocommerce_tax_rates WHERE tax_rate_id = %s", $key ) ) ? true : false;
+
+		if ( is_object( $key_or_rate ) ) {
+			$key       = $key_or_rate->tax_rate_id;
+			$compound  = $key_or_rate->tax_rate_compound;
+		} else {
+			$key 	   = $key_or_rate;
+			$compound  = $wpdb->get_var( $wpdb->prepare( "SELECT tax_rate_compound FROM {$wpdb->prefix}woocommerce_tax_rates WHERE tax_rate_id = %s", $key ) ) ? true : false;
+		}
+
+		return (bool) apply_filters( 'woocommerce_rate_compound', $compound, $key );
 	}
 
 	/**