Remove the text includes VAT

Yes, you can filter it out by adding the following code to your themes functions.php:

add_filter( 'wpo_wcpdf_woocommerce_totals', 'wpo_wcpdf_remove_includes' );
function wpo_wcpdf_remove_includes ( $totals ) {
	if ( isset($totals['order_total'])) {
		$value = $totals['order_total']['value'];
		$includes = substr(__( '(Includes %s)', 'woocommerce' ), 0, -3);
		$totals['order_total']['value'] = ($pos = strpos($value, ' '.$includes)) ? substr($value, 0, $pos) : $value;
	}
	return $totals;
}

Let me know if you have any other questions!

Ewout