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Corporation Tax Returns

Access the TSC Business
Booklets

Name

Description

Revised
Date

Due
Date

CT-1120

2015 Connecticut Corporation Business Tax Instructions

01/2016

N/A

Business Tax Returns

Name

Description

Revised
Date

Due
Date

CT-1120

2015 Corporation Business Tax Return

12/2015

CT-1120A

Corporation Business Tax Return Apportionment Computation (with instructions)

12/2015

CT-1120 ATT

Corporation Business Tax Return Attachment Schedules H, I, and J (with instructions)

12/2015

CT-1120AB

Add Back and Exceptions to Add Back of Interest and Intangible Expenses

12/2013

CT-1120K

Business Tax Credit Summary

12/2015

CT-1120I

Computation of Interest Due on Underpayment of Estimated Tax (with instructions)

12/2015

CT-1120X

Amended Corporation Business Tax Return

01/2016

CT-1120X

Amended Corporation Business Tax Return (Instructions)

12/2015
N/A

CT-NAICS

NAICS Codes for Principal Business Activity for Connecticut Tax Purposes

05/2004

N/A

Other Corporation Forms

Name

Description

Revised
Date

Due
Date

AU-796

Reinstatement Guarantee Declaration for Non-stock Corporations

03/2008

N/A

AU-797

Dissolution Guarantee Declaration for Stock Corporations

04/2008

AU-798

Dissolution Guarantee Declaration for Non-stock Corporations

03/2008

AU-800a

Withdrawal Guarantee Declaration for Corporations

03/2008

AU-801

Reinstatement Guarantee Declaration for Stock Corporations

03/2008

CT-1120A-A

Corporation Business Tax Return Apportionment Computation-Air Carriers

12/2008

CT-1120 A-BMC

Corporation Business Tax Return Apportionment Computation - Motor Bus and Motor Carrier Companies

12/2013

CT-1120 A-BPE

Corporation Business Tax Return Apportionment Computation - Broadcasters and Production Entities

12/2013

CT-8822C

Corporation Business Tax Change of Address

01/2014

N/A

CT-1120 A-CCA

Corporation Business Tax Return Apportionment Computation of Income From Credit Card Activities

12/2013

CT-1120 A-FS

Corporation Business Tax Return Apportionment Computation of Income from Financial Service Companies Activities

12/2014

CT-1120 A-IRIC

Corporation Business Tax Return Apportionment Computation of Income from Services to Regulated Investment Companies

2012

CT-1120 A-LP

Corporation Business Tax Return Apportionment of Limited Partnership Interests

01/2011

CT-1120 A-MFG

Corporation Business Tax Return Apportionment Computation - Manufacturing Companies

12/2014

CT-1120 A-SBC

Corporation Business Tax Return Apportionment Computation - Securities Brokerage Services

2012

CT-1120 CC

Authorization and Consent to be Included in a Combined Corporation Business Tax Return

12/2015

CT-1120 CC-R

Revocation of Election and Consent to File Combined Corporation Business Tax

12/2014

CT-1120 CR

Combined Corporation Business Tax Return

12/2015

CT-1120 CR

Combined Corporation Business Tax Return (Instructions)

12/2015

CT-1120 PIC

Information Return for Passive Investment Companies

01/2014

CT-1120 U

Unitary Corporation Business Tax Return

12/2015

CT-1120 U

Unitary Corporation Business Tax Return (Instructions)

12/2015

Credit Forms

Name

Description

Revised
Date

Due
Date

CT-1120 AT

Apprenticeship Training Tax Credit

12/2015

CT-1120 DA

Digital Animation Tax Credit

12/2015

N/A

CT-1120 DL

Donation of Land Credit

12/2015

CT-1120 EDPC

Electronic Data Processing Equipment Property Tax Credit

12/2015

CT-1120 FCIC

Fixed Capital Investment Credit

12/2015

CT-1120FP

Film Production Tax Credit

12/2015

CT-1120 FPI

Film Production Infrastructure Tax Credit

12/2015

CT-1120 GB

Green Building Tax Credit

11/2015

CT-1120 HCIC

Human Capital Investment Credit

12/2015

CT-1120 HH

Historic Homes Rehabilitation Tax Credit

11/2015

CT-1120 HP

Historic Preservation Tax Credit

12/2015

CT-1120 HPC

Housing Program Contribution Credit

12/2015

CT-1120 HR

Historic Rehabilitation Tax Credit

11/2015

CT-1120 HS

Historic Structures Rehabilitation Tax Credit

12/2015

CT-IRF

Insurance Reinvestment Fund Credit

11/2015

CT-1120 MEC

Machinery and Equipment Expenditure Credit

12/2015

CT-1120 NJC

New Jobs Creation Credit

11/2015

CT-1120 RC

Research and Experimental Expenditures Credit

11/2015

CT-1120 RDC

Research and Development Credit

11/2015

CT-1120 SBA

Small Business Guaranty Fee Tax Credit

11/2015

CT-1120SF

Service Facility Credit

11/2015

CT-1120 TIC-EZ

Manufacturing Facility Credit for Facilities Located in a Targeted Investment Community/Enterprise Zone NOTE: This form replaces Forms CT-1120CRMC, CT-1120CRMCEZ, CT-1120MC and CT-1120MCEZ

12/2014

CT-UISR

Urban and Industrial Site Reinvestment Credit

12/2015

CT-1120 XCH

Application for Exchange of Research and Development or Research and Experimental

01/2015

CT-1120 JET

2015 Job Expansion Tax Credit

12/2015

NAA-01

2016 Connecticut Neighborhood Assistance Act (NAA) Program Proposal - Fillable

02/2016

NAA-02

2016 Connecticut Neighborhood Assistance Act Business Application - Fillable

03/2016