WooCommerce - Smooth scrolls to the review tab and makes it active

activate-review-tab.php

<?php

add_action( 'woocommerce_after_single_product', 'activate_review_tab' );

function activate_review_tab() {
	echo '<script>
		jQuery(document).ready(function ($) {
			$("#add_review").click(function(){
		        var currentTab = $(this).attr("href");
		        $(".woocommerce-tabs .panel").hide();
		        $(".woocommerce-tabs li").removeClass("active");
		        $(currentTab).show();
				
				$("html, body").animate({
			        scrollTop: $(".woocommerce-tabs").offset().top
			    }, 1000);
		        return false;
		    });
		});
	</script>';
}

rating.php

// Add code to your-child-theme/woocommerce/single-product/rating.php

echo '<a id="add_review" href="#tab-reviews">Add a review</a>';