Connecticut State Department of Revenue Services

Upcoming CT DRS webinar: Select to register for the upcoming Withholding Forms W-2 and 1099 Annual Filing Webinar on Wednesday, January 15, 2025, at 10:00 a.m.

2015 Corporation Forms

Booklets

Name Description Revised Date
CT-1120 2015 Connecticut Corporation Business Tax Instructions  01/2016

Business Tax Returns

Name strong>Description Revised
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
Other Corporation Forms
Name Description Revised
Date
AU-796 Reinstatement Guarantee Declaration for Non-stock Corporations 03/2008
AU-797 Dissolution Guarantee Declaration for Stock Corporations 04/2008
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-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)

Credit Forms

Name

Description

Revised
Date
CT-1120 AT Apprenticeship Training Tax Credit 12/2015
CT-1120 DA Digital Animation Tax Credit 12/2015
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
CT-UISR Urban and Industrial Site Reinvestment Credit 12/2015
CT-1120 XCH Application for Exchange of Research and Development or Research and Experimental 12/2015
CT-1120 JET 2015 Job Expansion Tax Credit 12/2015