If you are seeking to do business in New York, you must file with the Department of State as outlined below. To file for a new business registration, you will need to submit the appropriate business forms: To file as a single proprietor, the Blumberg form is X201.If you are a C corporation, use the information in the chart below to help you determine some of the forms you may be required to file. Your first step to doing business in New Jersey is deciding which form of business organization you wish to operate under. The Certificate can be filed at the same time as documents of incorporation.