Arizona income tax return for S corporations. Arizona income tax return for multi-state corporations.Electronic filing of Arizona corporate income tax returns is required for the 2020 taxable year. 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. The Corporations Division provides a multitude of services for Arizona businesses, including approving articles of incorporation to start a corporation. If you've already formed an LLC or corporation, file Form 2553 with the Internal Revenue Service (IRS) to designate S corp taxation status. This kit gives clear, comprehensive instructions to direct you as you complete the steps of forming your own S corporation. Both the Phoenix and Tucson Offices are open for walk-in services Monday through Friday (except Holidays) from 8 am to 4 pm. Office of the Secretary of State