Form a corporation, limited liability company (LLCs), limited partnership or more and do business in New York State. Should you decide to create a limited liability company.(LLC) or corporation, you must then file with the. Small Business definition (FAR 19.001) and size standards (FAR 19.102). This article is for people who want to form an LLC in Arizona themselves. How to Start a Business. This form should not exceed five (5) pages.