All forms are in PDF format and are fillable (you can type in them). We recommend that you type the information so the documents are legible.Starting with the 2020 taxable year, electronic filing of Arizona corporate income tax returns is required. Which Corporations Must File a Return? The Arizona Corporation Commission website provides simple, fill-in-the-blank forms for articles of incorporation, with instructions. In Arizona, you would simply form either a for-profit corporation or a nonprofit corporation.