Import duties and custom duties limitation
Cleverific Order Editor is unable to support import duties and custom duties due to Shopify's platform limitations.
Import duties and custom duties in Order Editor
Because Order Editor doesn't receive any information to read the import or custom duty amount on an order, this amount will be reflected as a refund due on the order.
Workaround
Our best solution to prevent this refund due would be to add a custom product that is not taxable to your order for the amount of your import or custom duties.