Understand what you are shipping.
Truck, Air, Ocean, Courier or Rail
Have a description of your goods.
Preferably a web-link to your product for our tariff classification – this determines your duty and tax amount.
Understand the value of your shipment.
Most of the time this is going to be what you paid for the goods (excluding the cost of your freight services).
Be prepared to discuss the origin of your goods.
Where is the shipment coming from and where were the goods manufactured?