woocommerce_order_shipping_to_display_tax_label filter-hook . WC 1.0

Usage

add_filter( 'woocommerce_order_shipping_to_display_tax_label', 'filter_function_name_1813', 10, 3 );
function filter_function_name_1813( $html, $that, $tax_display ){
	// filter...

	return $html;
}

$html

-

$that

-

$tax_display

-

Where the hook is called

$shipping .= apply_filters( 'woocommerce_order_shipping_to_display_tax_label', '&nbsp;<small class="tax_label">' . WC()->countries->ex_tax_or_vat() . '</small>', $this, $tax_display );

$shipping .= apply_filters( 'woocommerce_order_shipping_to_display_tax_label', '&nbsp;<small class="tax_label">' . WC()->countries->inc_tax_or_vat() . '</small>', $this, $tax_display );

Where in WP core the hook is used WooCommerce