I added some fields during checkout, can I add them to the export ?

If you want to add some checkout data into the export (for example, data you added using WooCommerce Checkout Field Editor), you can do it using a  filter.

First, you have to identify the keys you of the fields you want to export : in the back-end, when you are to the Quick Export panel, in the “help” tab top right, there is a Quick export tab with the all the post meta you can use.

Then, you have to put a piece of code into your functions.php theme file : 

function wqep_included_order_keys_filter_custom($keys)
{
	array_push($keys, '_my_key');
	//array_push($keys, 'another_key'); etc...
	return $keys;
}

add_filter( 'wqep_included_order_keys_filter', 'wqep_included_order_keys_filter_custom' );

In this example, we will add the data "_my_key" to the order export.

You can change this key by one you want to export. If you have more, juste add some other lines :  array_push($keys, '_my_other_key');