The default option for shipping internationally from Czechia is delivery responsibility unpaid. Common carriers use the phrase EXW which essentially assigns all import relevant costs (duty, taxes, and various fees) for the receiver/ importer. The time it takes to acquire a parcel from Poland to Canada is Commonly 24-72h. https://geraldp429fnt5.estate-blog.com/27693742/the-5-second-trick-for-cheapest-shipping-solution-for-your-shopify-store