To start any type of corporation in Massachusetts, you must file Articles of Organization with the Secretary of the Commonwealth. All business corporations organized under the laws of the Commonwealth, except those dissolved prior to July 1, 2004, file on the forms provided below.All the following forms are fillable PDF files that require Adobe Acrobat Reader for viewing. File sizes range from 60 KB to 250 KB. To form a corporation in Massachusetts, you must file articles of organization with the Secretary of State. DOR has released its 2024 Massachusetts Corporate Excise tax forms. You will also find prior year forms and estimated tax payment vouchers.