From OPAL, the New York State's Online Permit Assistance and Licensing website:
If you want to start a new business or expand your current business, this site will help you find the New York State business permits you may need.
IMPORTANT NOTICE: Due to a scheduled upgrade, the online forms will NOT be available from September 6 through September 13, 2011. This website will NOT be available from September 9 through September 13, 2011. We apologize for any inconvenience this may cause.