Collecting Sales From Magento
To collect from Magento 1 you just need to login to your orders page. For Magento 2 you need to add your login details to the Credentials dialog in Packing Partner.
You also need to enable the Magento feature under Collect Sales and Update Sales from Tools>Features
Adding Magento 2 credentials
In Packing Partner go to Tools>Credentials and add your Account name and admin login details.
The Magento Account Name is shown on Packing Partner's Title Bar when your navigate to your Magento admin pages.