How to Find a Schedule B Number
You can find the export codes at the U.S. Census Bureau Website. You only need to search the database of HS codes to find the correct one. The designation seems arbitrary at first, but the codes do follow a structured system. For example, the first two digits are used to classify all products into 15 categories.
The categories are Animal & Animal Products (01-05), Vegetable Products (06-15), Foodstuffs (16-24), Mineral Products (25-27), Chemical & Allied Industries (28-38), Plastics/Rubbers (39-40), Raw Hides/Skins/Leathers (41-43), Wood & Wood Products (44-49), Textiles (50-63), Footwear/Headgear (64-67), Stone/Glass (68-71), Metals (72-83), Machinery/Electrical (84-85), Transportation (86-89), and Miscellaneous (90-97).