Duties and import taxes
If you ship internationally, then your customers might be charged duties and import taxes when their shipment arrives. You can collect an estimate of those amounts at checkout instead, which helps your customers avoid unexpected charges on delivery.
Understanding what your customer is charged
Customs authorities set the amount from the product's classification, its origin, and the destination's rules. Understanding customs fees covers the individual fees and the de minimis thresholds that decide which of them apply. Carriers and shipping terms covers who collects the charges and who pays them, and Understanding tariffs covers the tariff programs charged on top.
Setting up duty and import tax collection
Start with the considerations, because some checkout customizations, destinations, and order types aren't supported. Then collect duties and import taxes at checkout, which covers the transaction fee, the Harmonized System (HS) codes your products need, the settings that change how amounts are calculated, and how to stop collecting.
Shipping internationally and staying compliant
Additional tasks covers Delivered Duty Paid (DDP) labels, commercial invoices, your shipping policy, and refunds. If you ship between the United States, Mexico, and Canada, then work through the USMCA compliance checklist. When a charge isn't what you expected, troubleshooting covers the common causes.