Every year, foreign and domestic businesses are required to file an annual report to keep their UBI active and remain in good standing. Washington requires corporations to file an annual report on or before the last day of the anniversary month of the company's incorporation.Navigate the process of forming a corporation in Washington with our detailed guide. Corporations in Washington are required to file an annual report before the end of their anniversary month each year. All corporations (corporations that elect for S Corporation tax treatment included) in the United States must hold an annual meeting. Determine your filing due date and fees. Complete your report online OR download a paper form. Information and assistance with your Washington articles of incorporation. This page provides the guidance you need to start your corporation. All corporations (corporations that elect for S Corporation tax treatment included) in the United States must hold an annual meeting.