Set Default Line Item based on PreDefined Line Item

functions.php

<?php // don't add this line since it's already in your functions.php file

function si_lineitem_default_on_pdli( $columns = array(), $type ) {
	 
	if ( '' != $type || 'default' != $type ) {
		return $columns;
	}
        
	$columns['desc']['value'] = $item->get_content();
	$columns['rate']['value'] = $item->get_default_rate();
	$columns['qty']['value'] = $item->get_default_qty();
	$columns['tax']['value'] = $item->get_default_percentage();
  $columns['sku']['value'] = $item->get_default_sku();
	
	return $columns;
}
add_filter( 'si_line_item_columns', 'si_lineitem_default_on_pdli', 10, 2 );

This snippet is a customization for Sprout Invoices. A customizable solution that provides a way for you to get paid via your WordPress site. For more information please don't hesitate to reach out.