How can I send a message to declare dhl express sent from abroad?

Dhl doesn't need to pay taxes and declare customs when the value of goods is less than 5000 RMB, but once the number of samples is too large and the value of goods exceeds 5000 RMB, dhl staff will ask these receiving enterprises or individuals to provide relevant documents for export declaration. At this time, enterprises or individuals need to take the arrival notice, waybill number, packing list and invoice to the customs broker for customs declaration, and the customs will issue a tax bill and release it after paying the tax.