Sales Tax Publications
I find this list useful because it addresses the requirements of specific industries, as well as general information such as what new businesses need to know. Some examples: Veterinarians, Hotel and Motel Operators, Drugstores and Pharmacies, Broadcasters, the Film Industry, Snowmobile Dealers, Manufacturers, Exempt Organizations, and Residential Energy Sources and Services, the latter updated as of September 1, 2010.