The Sales and Use Tax Permit bascially is a business license. It sounds like that's all you'd need then and an employer ID# if applicable. I consulted with both and attorney and an accountant before starting up to make sure I wasn't missing anything. I also found the info our state has on the DRS website for starting a business helpful.
http://www.ct.gov/drs/cwp/view.asp?A=1454&Q=266112