Use this form to apply for an automatic six-month extension of time to file Arizona Forms 140, 140A, 140EZ, 140ET, 140PTC, 140PY, or 140NR. Arizona offers a 6-month tax extension, which moves the state filing deadline to October 15 (for calendar year filers).File Form 4868 and Extend your 1040 Deadline up to 6 Months. File extension in few minutes; No explanation Required; Quick Processing; Instant IRS Approval. When you file your Arizona return, be sure to check box 82F, top of page 1 on Form 140, to indicate an extension was filed. If in its judgment good cause exists, the department may grant a further extension or extensions of time for filing the return pursuant to administrative rule. Extension Deadline is November 15, 2024 to file your Arizona corporate income tax return. Alaska has no state income tax, therefore no extension of time to file is required. Back to State table. Arizona. Form 4868 is used to apply for an extension of time to file your U.S. individual income tax return.