public function get_tax_classes( $fields = null ) {
		try {
			// Permissions check
			if ( ! current_user_can( 'manage_woocommerce' ) ) {
				throw new WC_API_Exception( 'woocommerce_api_user_cannot_read_tax_classes', __( 'You do not have permission to read tax classes', 'woocommerce' ), 401 );
			}

			$tax_classes = array();

			// Add standard class
			$tax_classes[] = array(
				'slug' => 'standard',
				'name' => __( 'Standard rate', 'woocommerce' ),
			);

			$classes = WC_Tax::get_tax_classes();

			foreach ( $classes as $class ) {
				$tax_classes[] = apply_filters( 'woocommerce_api_tax_class_response', array(
					'slug' => sanitize_title( $class ),
					'name' => $class,
				), $class, $fields, $this );
			}

			return array( 'tax_classes' => apply_filters( 'woocommerce_api_tax_classes_response', $tax_classes, $classes, $fields, $this ) );
		} catch ( WC_API_Exception $e ) {
			return new WP_Error( $e->getErrorCode(), $e->getMessage(), array( 'status' => $e->getCode() ) );
		}
	}