How to check whether the courier sent back from abroad is taxed?

For example, if regular express delivery companies (EMS, DHL, TNT, etc. ) are taxed, the customs will inform them by SMS that they need to pay taxes at the local customs before they can be released.

Tariff refers to the tax levied on importers and exporters by the customs established by the government when import and export commodities pass through the customs territory of a country. On March 7th, the State Council issued the Regulations on Import and Export Tariffs of People's Republic of China (PRC). 1On October 22nd, the 19th meeting of the Standing Committee of the 6th NPC passed the Customs Law of People's Republic of China (PRC), the fifth chapter of which is tariffs. From June 5th to 10, 2003, the State Council revised and issued the Regulations on Import and Export Tariffs of People's Republic of China (PRC) according to the Customs Law. As a specific implementation method, the Measures for the Administration of Import and Export Goods Tax of People's Republic of China (PRC) Customs was deliberated and adopted on June 5, 2004 and came into force on March 6, 2005.