Code to remove the incl.tax text from the invoice pdf - By WebToffee (WooCommerce PDF Invoices, Packing Slips and Credit Notes)

function.php

<?php //Do not copy this line of code
add_filter('wf_pklist_alter_tax_inclusive_text','wf_pklist_remove_tax_text',10,3);
function wf_pklist_remove_tax_text($incl_tax_text, $template_type, $order)
{
	if( 'invoice' === $template_type )
	{
		$incl_tax_text = '';
	}
	return $incl_tax_text;
}