Code snippet to hide tax items from invoice document - By WebToffee

functions.php

<?php> //Do not copy this line of code
add_filter('wf_pklist_alter_template_html', 'wt_remove_tax_items_row_from_invoice', 10, 2);
function wt_remove_tax_items_row_from_invoice( $html, $template_type ) {
	if ( $template_type === 'invoice' && strpos( $html, 'data-row-type="wfte_tax_items"' ) !== false ) {
		// Only run regex if pattern likely exists
		$html = preg_replace(
			'/<tr[^>]*data-row-type="wfte_tax_items"[^>]*>.*?<\/tr>/is',
			'',
			$html
		);
	}
	return $html;
}