INSTRUCTIONS: ARIZONA AMENDED CORPORATION INCOME TAX RETURN (Form 120X)

Arizona corporations may use a form 120X in order to amend an earlier state income tax return. The document can be found on the website of the Arizona Department of Revenue. This article discusses the form for tax year 2011.

Arizona Amended Corporation Income Tax Return 120X Step 1: At the top of the form, indicate whether you are filing for calendar year 2011 or a fiscal year. If the latter, give the starting and ending dates.

Arizona Amended Corporation Income Tax Return 120X Step 2: Give your business telephone number, activity code number, name, address, federal employer identification number and your state privilege tax number.

Arizona Amended Corporation Income Tax Return 120X Step 3: Check the boxes where indicated if filing to document a name or address change.

Arizona Amended Corporation Income Tax Return 120X Step 4: Lines A through E concern your filing status and reason for amending. Answer all questions with check marks.

Arizona Amended Corporation Income Tax Return 120X Step 5: Lines 1 through 4 must be completed by all businesses. Note that for lines 1 through 24, three columns must be filled in. Record your originally filed figures in column (a), your net increase or decrease in column (b), and your amended figures in column (c).

Arizona Amended Corporation Income Tax Return 120X Step 6: Subtract line 4 from line 3. Enter the difference on line 5. If you are a solely Arizona-based corporation, skip to line 13. Otherwise, complete lines 6 through 12.

Arizona Amended Corporation Income Tax Return 120X Step 7: If you are a multistate corporation, you must complete Schedule C on the second page in order to complete line 9.

Arizona Amended Corporation Income Tax Return 120X Step 8: All corporations must complete lines 13 through 36 to determine tax owed or any refund due.

Arizona Amended Corporation Income Tax Return 120X Step 9: In Schedule D, list payments made with your original return and those made after the return was filed.

Arizona Amended Corporation Income Tax Return 120X Step 10: In Schedule E, provide a written explanation of all reported changes.

Arizona Amended Corporation Income Tax Return 120X Step 11: At least one or more officers of the corporation must sign and date the form, as well as entering their title.