Note: Sometimes orders shipping to US territories will require customs. See this article for more info.
To set customs information, open on the order edit window by clicking on the order number hyperlink and click on the Customs tab
Choose the Package Contents and Non-Delivery Instructions, and add a declaration for each item in the order, including:
Declared values should be the final order/item total which includes the discount of the order so the customer is not paying taxes on the full value of the order.
You can also add customs information to products directly in the Products Module so that this information automatically populates when an international order is placed. You can do this in bulk via the Customs tab on the Product Import Template spreadsheet or in the Skubana UI by clicking on a Master SKU in the Products module and going to the Customs tab.