Firoozeh Athari's Arta Gallery in Toronto

Adhere to local licensing and permit requirements. Your gallery will have to be licensed to operate as business. The exact requirements for doing so vary by location, but at minimum you will need a business license issued by your city or state. The best way to find out what you need is to contact your local branch of the Small Business Administration (SBA) or an equivalent organization that offers help to small businesses. Try searching online for your location and "business licensing" to locate a government website that will explain what is required of you.