Form Ct-1120x - Amended Corporation Business Tax Return Instructions

Department of Revenue Services

2012

PO Box 2974

Form CT-1120X

Hartford CT 06104-2974

Amended Corporation Business Tax Return Instructions

(Rev. 01/13)

General Instructions

When to File

Generally, Form CT-1120X must be filed within three years from

Complete this return in blue or black ink only.

the due date of the original return or, if an extension of time to file

Use 2012 Form CT-1120X to correct a 2012 Form CT-1120,

was requested and granted, three years from the extended due date.

Corporation Business Tax Return, or 2012 Form CT-1120U,

See Internal Revenue Service Adjustments or Federal and

Unitary Corporation Business Tax Return:

Connecticut Amended Return Changes.

• As it was originally filed;

• As it was later amended by the corporation;

Remittance

• As it was later adjusted by the Department of Revenue Services

Make check payable to Commissioner of Revenue Services.

(DRS); or

To ensure payment is applied to your account, write “2012 Form

CT-1120X” and the corporation’s Connecticut Tax Registration

• To report federal adjustments by the Internal Revenue Service

Number on the front of your check. Attach check to return with

(IRS).

paperclip. Do not staple. DRS may submit your check to your bank

Combined Returns

electronically.

To amend a combined corporation business tax return for income

Where to File

years beginning on or after January 1, 2006, a taxpayer must file

Mail return with payment to:

Form CT-1120CR, Combined Corporation Business Tax Return,

for the applicable tax year and check the Amended box to indicate

Department of Revenue Services

an amended return is being filed.

State of Connecticut

PO Box 2974

If a corporation is amending Form CT-1120CR for income years

Hartford CT 06104-2974

beginning prior to January 1, 2006, complete Form CT-1120X.

Mail return without payment to:

Internal Revenue Service Adjustments

Department of Revenue Services

Adjustments to taxable income made by the IRS must be reported

State of Connecticut

to the Commissioner of Revenue Services on or before 90 days

PO Box 150406

after the final determination of the adjustment. Report such

Hartford CT 06115-0406

adjustments on this form, and attach a complete copy of the IRS

notification of changes.

For More Information

Call DRS during business hours, Monday through Friday:

Federal and Connecticut Amended Return Changes

If a corporation has filed an amended return with the IRS and

• 1-800-382-9463 (Connecticut calls outside the Greater

the amendment affects the corporation’s Connecticut tax return,

Hartford calling area only); or

then within 90 days of the IRS final determination on that

• 860-297-5962 (from anywhere).

amended federal return, the corporation shall file this form and

TTY, TDD, and Text Telephone users only may transmit inquiries

attach a copy of federal Form 1120X, Amended U.S. Corporation

anytime by calling 860-297-4911.

Income Tax Return.

If the adjustment on a Connecticut amended return is not related to

Completing Form CT-1120X

an adjustment made on a federal amended return (e.g. an adjustment

Step 1: Enter the beginning and ending dates of the income

to Connecticut net income, Connecticut minimum tax base, a

year, the corporate name, address, Connecticut Tax Registration

Connecticut apportionment factor, a Connecticut net operating

Number, and Federal Employer Identification Number (FEIN) in

loss, or a Connecticut corporation business tax credit), explain such

the spaces provided. Check the appropriate box for the Connecticut

adjustment in detail and attach all appropriate supporting forms

corporation business tax return being amended. Indicate whether

and schedules.

the taxpayer is currently under Connecticut audit, the reason for

amending the return and whether the taxpayer has a monthly net

Rounding Off to Whole Dollars

You must round off cents to the nearest whole dollar on your return

employment gain.

and schedules. If you do not round, DRS will disregard the cents.

Round down to the next lowest dollar all amounts that include 1

through 49 cents. Round up to the next highest dollar all amounts

that include 50 through 99 cents. However, if you need to add two

or more amounts to compute the amount to enter on a line, include

cents and round off only the total.

Example: Add two amounts ($1.29 + $3.21) to compute the total

($4.50) to enter on a line. $4.50 is rounded to $5.00 and entered

on a line.

Form CT-1120X Instructions (Rev. 01/13)

Page 2 of 2

Form Ct-1120x - Amended Corporation Business Tax Return Instructions - 2012

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