How Do I Amend an Arizona State Return?

If you need to correct information on an Arizona state tax return that has already been accepted, you'll need to file an amended Arizona return. This allows you to update income, deductions, credits, filing status, or other items that may affect your state tax liability.

Arizona uses Form 140X to amend individual income tax returns. Our software can help you generate the required amended return, but Arizona currently requires amended individual returns to be filed by mail.

How Do I Generate an Amended Arizona Return?

To create an amended Arizona state return in the software, follow these steps:

1. Select 2026 Amended Return from the navigation menu.
2. Pay for your amended return, if applicable.
3. Review the Filing an Amended Return information page and select Continue.
4. Choose Amend State Return(s).
5. Select Amended State in the state return section.
6. Scroll to the bottom of your Arizona return menu and select Amended Return.
7. Answer Yes when asked if you want to create Form 140X.
8. Complete the remaining amended return questions and enter any updated tax information.

As you work through the amendment, be sure to provide accurate details about the changes you're making. This helps Arizona process your amended return more efficiently.

What If I Received a Refund From My Original Arizona Return?

If Arizona issued a refund for your original return, you'll need to report that amount on your amended return.

To enter the refund:

1. Navigate to the Amended Return section using the steps above.
2. Select Review and Complete Amended Return.
3. Enter the refund amount in the field labeled Refund from original return.

Including this information ensures the amended return calculation reflects any refund you already received from the state.

What If I Paid Tax With My Original Return?

If you made a payment when you filed your original Arizona return, you'll also need to report that payment on the amended return.

To enter the amount:

1. Go to the Amended Return section.
2. Select Review and Complete Amended Return.
3. Enter the amount you paid in the field labeled Enter the amount paid with your original return.

This helps prevent your payment from being overlooked when Arizona recalculates your tax balance.

How Do I File My Amended Arizona Return?

Arizona amended individual income tax returns must be paper-filed.

After completing your amended return:

1. Select Review > Summary from the navigation menu.
2. Open the Tax Return Summary page.
3. Select View Return to generate your PDF.
4. Print the amended Arizona return.
5. Sign and date the return.
6. Mail it to the appropriate Arizona Department of Revenue address listed on the form instructions.

Only mail the amended return and supporting documents that explain or support the change, such as:

• Form W-2
• Form 1099
• Schedules showing corrected information
• Other documents related to the amendment

In most cases, you do not need to mail a copy of your originally filed return unless Arizona specifically requests it.

The mailing address may vary depending on whether you're claiming an additional refund or sending a payment. Always use the address shown in the Form 140X instructions or on your printed return.

Do I Need to Explain the Changes on My Amended Return?

Yes. Arizona requires taxpayers to provide an explanation of the changes being made.

When completing your amended return, include a clear description of:

• What was changed
• Why the change is necessary
• Any supporting information related to the correction

A complete explanation can help reduce processing delays and requests for additional information.

Additional Tips Before Filing an Arizona Amended Return

Before mailing your amendment:

• Compare your original and amended returns to verify all changes.
• Review supporting documents to make sure they match the updates you're reporting.
• Keep copies of everything you mail for your records.
• If you're amending because of changes made by the IRS, include any applicable IRS notices or supporting documentation.

Taking a few extra minutes to review your return can help avoid processing delays and ensure Arizona has everything needed to complete your amendment.