The U.S. Census Bureau has an International Trade Help line at 800-549-0595. Choose option 1 for assitance with the Automated Export System (AES). Choose option 2 for assistance with classifying a product. Choose option 3 for regulatory assitance. Choose Option 4 for assistance with data producted related to imports and exports. Choose option 5 for assistance with outreach and Automated Commercial Environment (ACE) Export Reports.