Form a corporation, limited liability company (LLCs), limited partnership or more and do business in New York State. The County Clerk requires one original notarized form for file.We have all the info on how to form a NY LLC in our step-by-step guide. IMPORTANT: The online filing process has changed. The state of New York requires you to file Certificate of Organization in order to form an LLC. You must file the certificate in the office of the County Clerk in the county where your business is located. Get the Certificate of Assumed Name form. To start an LLC in New York, file Articles of Organization with the New York Division of Corporations.