Remove Discount

Hello @swerlz

If you are referring to the discount in the totals you can remove it using the code snippet below inside your theme functions.php file:

add_action( 'wpo_wcpdf_custom_styles', function( $document_type, $document ) {
	?>
	.order-details .discount { display: none; }
	<?php
}, 10, 2 );

if you never worked with actions/filters please read this documentation page: How to use filters