140X-SBI: Small Business Amended Income Tax Return (2025)

Who files this form

Form 140X-SBI is used to amend an Arizona small business income tax return filed on Form 140-SBI, 140NR-SBI or 140PY-SBI. This version is for calendar year 2025 or a fiscal year beginning in 2025.

If you are rescinding your small business election, the form directs you to complete both Form 140X-SBI and Form 140X, and include Form 140X-SBI with Form 140X when you file.

What you'll need

• Your original return or most recent amended return, for the amounts you are changing.
• Applicable federal Schedules B, C, D, E and F, and Form 4797, for the income entries. If you report Schedule C income, the form also asks for the NAICS code shown on Schedule C.
• Applicable Arizona schedules and forms supporting your adjustments and credits, such as Form 141AZ Schedule K-1 and Form 301-SBI.
• Amounts of your 2025 Arizona estimated tax payments, extension payment, payments made with or after the original return, and any overpayment from the original return or as later adjusted.
• Your routing and account numbers if you request direct deposit of a refund.

Place any required federal and Arizona schedules or other documents after Form 140X-SBI. Do not staple any items to the return.

How to file

1. Enter your identifying information and Social Security number. Your filing status must match Form 140, 140NR or 140PY.
2. Complete the applicable income, adjustment, tax, payment and refund or amount-owed lines.
3. Complete page 3, Parts 1(A), 1(B), 2 and 3, to report changes and the reasons for them. Show the original amount, the amount added or subtracted, and the corrected amount for each item you change.
4. Sign and date the return. A paid preparer must also sign and date it and provide their street address, preparer TIN and phone number.
5. Place required supporting documents after the form without stapling them.

If you are sending a payment, include it with Form 140X-SBI and mail to:

Arizona Department of Revenue

PO Box 52016

Phoenix, AZ 85072-2016

Write your Social Security number, “Form 140X-SBI” and the tax year on your payment.

If you expect a refund, owe no tax, or owe tax but are not sending a payment, mail to:

Arizona Department of Revenue

PO Box 52138

Phoenix, AZ 85072-2138

Common mistakes

• Using a filing status that does not match Form 140, 140NR or 140PY.
• Stapling items to the return. The form says not to staple any items and to place required supporting documents after Form 140X-SBI.
• Forgetting to sign and date the return or leaving out required paid preparer information.
• Leaving out the reasons for changes on page 3.
• Failing to check box 73a and enter your current address in Part 3 when your address has changed from your original or latest filed return.
• Rescinding your small business election without checking box 70R, completing both Form 140X-SBI and Form 140X, and including Form 140X-SBI with Form 140X.
• Marking the area labeled “Revenue Use Only.”

Questions people ask

Which returns can I amend with Form 140X-SBI?

The form is for amending Forms 140-SBI, 140NR-SBI and 140PY-SBI.

How do I explain my changes?

On page 3, list the items you are changing and show the original amount, the amount of the change and the corrected amount. Use Part 2, line 72, to give the reason for each change listed in Parts 1(A) and 1(B).

Can I apply an overpayment to next year's estimated tax?

Yes. Line 67 lets you apply an amount from your overpayment on line 66 to 2026 estimated tax.

Can I request direct deposit of my refund?

The form provides a direct deposit option. Select checking or savings and enter your routing and account numbers. Check box 68A if the deposit will ultimately be placed in a foreign account.

What if I am rescinding my small business election?

Check box 70R and complete both Form 140X-SBI and Form 140X. Include Form 140X-SBI with Form 140X when you file. The form refers you to the Form 140X-SBI instructions for information about rescinding the election.

Official sources

• https://azdor.gov/forms