You want to change List of column in prestashop Orders list :
First step Go to Controllers/admin/AdminOrdersController.php
How to add column in List of orders in back office prestashop 1.7
Go to line :107
Example Add total HT to list
And total Ht automaticaly add to exportorders:
'total_paid_tax_incl' => array(
'title' => $this->trans('Total TTC', array(), 'Admin.Global'),
'align' => 'text-right',
'type' => 'price',
'currency' => true,
'callback' => 'setOrderCurrency',
'badge_success' => true
),