The following information has been developed to answer your questions regarding formation of an LLC and to assist in the filing of the Articles of Organization. You must receive a Certificate of Assumed Name from your county clerk.This certificate is often called a "business certificate." To file as a single proprietor, the Blumberg form is X201. To file as a partnership, the Blumberg form is X74. Is your Business a sole proprietorship or do you have an individual general partner? ▫ If YES, complete Sections 1, 2, and 4. Steps for filing a dba for sole proprietors and general partnerships. To sign a contract, you'll need to use the legal name of your business. You'll also want to be transparent that your business uses a DBA.