I will be a Sole Proprietorship
Arizona is a community property state and a husband and wife can operate as a sole proprietorship. The creation of a business as a sole proprietorship requires no formal Arizona filing (as would be required for a corporation or limited liability company, for instance.)
Generally, an individual can operate under their social security number as a sole proprietor with no employees, however, if they wish to obtain an Employer Identification Number (EIN), they can do so. For more information, see the Employer Identification Number (EIN) section below or click here. (23)