US Customs and Border Protection
Official US import regulations and tools
Customs & Compliance
HS code lookup, tariff information, and customs clearance resources
Official customs resources and documentation guides
China General Administration of Customs
Official China customs authority
US ACE Portal
US Automated Commercial Environment — file import entries and ISF
UK Customs Declaration Service
UK's digital customs declaration system for imports
EU ICS2 (Import Control System 2)
EU import control system — new pre-arrival security filing rules
ATA Carnet
Temporary import documents for samples and trade-show goods
Japan Customs
Japanese import rules, tariffs and procedures
Korea Customs Service
Korean import duties and customs procedures
Indian Customs (CBIC)
Indian import duties and customs rules
Singapore Customs
Singapore import duties, GST and trade procedures
Vietnam Customs
Vietnamese import duties and clearance procedures