Arizona State Tax Extension Filing Requirements – A Complete Guide

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Tax season can bring a variety of challenges, particularly when it comes to state-specific filing requirements. If you’re looking to extend your Arizona state tax filing deadline, it’s important to understand the unique rules in place. When you don’t have your approved federal extension, Arizona state needs to file a separate extension to avoid penalties. 

In this guide, we’ll break down everything you need to know about Arizona’s State Tax Extension process, including the forms you need to file and the key dates you don’t want to miss. This blog is part of our ongoing series on state tax filing requirements, with our previous post covering Georgia’s state requirements in detail.

Business Tax Extension Filing Requirements in Arizona

If you are operating a business in Arizona, whether the business structure is a corporation, partnership, exempt organization, or fiduciary, you may need to file for an extension to extend your business income tax return deadline to avoid the potential penalties. The process of filing a state tax extension is simple, but understanding the requirements, the necessary forms, and the deadline is essential.

Forms Used to Request a Business Tax Extension

Generally, Arizona state grants you an automatic extension if you have an already approved federal business tax extension Form 7004. This extension will apply to your state filing, and no separate state extension is needed.

However, if your federal business tax extension is rejected or you do not file for one, the state requires you to file a separate one to extend your state income tax return deadline. The extension can vary depending on your business’s structure:

• Forms 120/165 EXT – For businesses operating as Corporations, S-Corporations, and Partnerships.
  
• Form 141AZ EXT – For businesses operating as Fiduciaries.

Information Required

When filing an extension you’ll need to provide the following details about your business including:

• Business name and address
• Type of business entity (corporation, S-corporation, partnership, fiduciaries)
• Employer Identification Number (EIN)
• Business tax year-end date
• Estimated taxes due 

Key Deadlines

The deadline for filing an extension can vary depending on the business structure, that you’re operating in Arizona state:

Forms Due By March 17, 2025

• For S-Corporations – If you are an S-corp and need to file an extension for Form 120S the deadline is March 17, 2025. 
• For Partnership – If you need to file an extension for Form 165, the deadline is March 17, 2025. 

Forms Due By April 15, 2025

• For Corporations – The deadline to file an extension for Form 120 is April 15, 2025. 
• For Fiduciary – The deadline to file an extension for Form 141AZ is April 15, 2025.

Tax Payment

Filing an extension gives you additional time to file your tax return, not to pay any taxes owed. If you owe any taxes, you must complete your payment by the original due date. Failure to pay on time may result in penalties and interest, even though the filing deadline is extended.

Mailing Address 

Once you’ve completed your extension forms, you can mail them to the following mailing address:

Personal Tax Extension Filing Requirements in Arizona

If you are a taxpayer and need more time to file your personal income tax return in Arizona, you may need to apply for an extension.

Forms Used to Request a Personal Tax Extension

Arizona state grants an automatic extension if you’ve already filed a federal extension Form 4868. This extension will apply to your state filing so that a separate state extension is not required.

However, if you don’t have any federal approved extension or you didn’t file for one, you must file Form 204 (Application for Filing Extension For Individual Returns Only) to request an extension for your state return.

Key Deadlines

The deadline is based on the type of extension you’re requesting:

• The deadline to file your personal tax extension Form 4868 is April 15, 2025.
  
• If you need an extension of filing Form 204, the deadline is April 15, 2025.

Tax Payments

Likewise, a business tax extension, this extension only extends the tax filing deadline, not to pay any tax owed. If you owe taxes, you must complete a payment by the original due date to avoid penalties and interest.

Mailing Address

Once you’ve filed your extension forms, you can mail them to the following address based on the payment:

Simplify Extension with ExpressExtension

ExpressExtension makes it easy and stress-free to file your extension. Our platform simplifies the entire process, ensuring your extension request is approved without any errors and mistakes. We also offer support for state extension filings for both individuals and businesses, making your state tax extension filing more convenient than ever.

• Select Form 120/165EXT or 141AZ
• Complete all the necessary information in the appropriate boxes.
• Review the details, print and download it, and mail it to the respective state agency.

With the deadline approaching, ExpressExtension streamlines the process, but it’s important to understand your state’s filing requirements. Stay informed and submit your extension on time to get an extension for your filing deadline.