TaxFormFinder
Connecticut Combined Unitary Corporation Business Tax Return
The tax filing deadline of April 16th is here! - eFile your return online here 
, or request a six-month extension here .
, or request a six-month extension here .Extracted from PDF file 2023-connecticut-form-ct-1120-cu.pdf, last modified December 2023Combined Unitary Corporation Business Tax Return
Enter Income Year Beginning 2023 Form CT-1120CU Department of Revenue Services State of Connecticut (Rev. 12/23) 1120CU 1223W 01 9999 Combined Unitary Corporation Business Tax Return 2023 and Ending M M - D D - Y Y Y Y M M - D D - Y Y Y Y Name of Connecticut designated taxable member Connecticut Tax Registration Number Number and street PO Box Federal Employer ID Number (FEIN) City, town, or post office State ZIP code Check All Applicable Boxes: 1. 2. Unitary return status: Initial return Address change Final Short period Amended 3a. Is any member requesting a refund for the Student Loan Payment tax credit? Amount of credit to be issued in .00 the form of a refund requested:.............. Yes (File Form CT-RSLP separately.) 3. Is any member exchanging R & D tax credits? ................................................ Amount of credit to be issued in .00 the form of a refund requested: ............. Yes (File Form CT-1120 XCH separately.) 4. Did the unitary group annualize its estimated tax payments? Yes (Attach Form CT-1120I.) No Worldwide 5. Filing Method: Water’s Edge Affiliated Group See instructions. (Default) (Election) (Election) Part III – Computation of Amount Payable - Complete Part I, Part II, and Schedule KU before completing Part III. 1. Combined Unitary Tax: Enter amount from Part I, Line 9, Combined Group Total column. ............. 1. .00 2. Combined Unitary Tax Credits: Enter amount from Part II, Line 8. ................................................. 2. .00 3. Balance of tax before PE credit: Subtract Line 2 from Line 1. ........................................................ 3. .00 4. Total PE credit applied from all members. See instructions. ............................................................... 4. .00 5. Balance of tax payable: Subtract Line 4 from Line 3, but not less than zero (“0”). .......................... 5. .00 6a. Amount paid with Form CT-1120 EXT. ................................. 6a. .00 6b. Amount paid with Forms CT-1120 ESA, ESB, ESC, and ESD. 6b. .00 6c. Overpayment from prior year. ............................................... 6c. .00 6. Tax payments: Add Lines 6a, 6b, and 6c. ........................................................................................6. .00 7. Balance of tax due (overpaid): Subtract Line 6 from Line 5. ........................................................ 7. .00 8a. Penalty. ............................................................................................................................................8a. .00 8b. Interest. ............................................................................................................................................8b. .00 8c. Form CT-1120I Interest. .................................................................................................................. 8c. .00 8. Total penalty and interest: Enter the total of Lines 8a, 8b, and Line 8c. ..................................... 8. .00 9a. Amount to be credited to 2024 estimated tax. ............................................................................. 9a. .00 9b. Amount to be refunded. .................................................................................................................9b. .00 For a faster refund, choose Direct Deposit by completing Lines 9c through 9e. 9c. Checking Savings 9d. Routing number 9e. Account number 9f. Will this refund go to a bank account outside the U.S.? Yes 9g. Bank name 10. Total to be credited or refunded: Enter the total of Line 9a and Line 9b. .................................. 10. .00 11. Balance due with this return: Add Line 7 and Line 8. ................................................................. 11. .00 Please note that each form is year specific. To prevent any delay in processing your return and/or refund, the correct year’s form must be submitted to the Department of Revenue Services (DRS). Visit us at portal.ct.gov/DRS for more information. Form CT-1120CU Page 2 of 7 (Rev. 12/23) 1120CU 1223W 02 9999 Connecticut Tax Registration Number Schedule of Members Included in the Combined Unitary Return. (Enter taxable members first.) Line Member # 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31. 32. 33. 34. 35. 36. 37. 38. 39. 40. 41. 42. 43. 44. 45. 46. 47. 48. 49. 50. 1. Corporation Name Taxable (Y/N) For more than 50 members, attach replicas of this page as needed, with the same information and begin numbering with 51. CT Tax Registration Number * Y Designated Taxable Member This page should only be completed and submitted if filing a paper return. FEIN − − − − − − − − − − − − − − − − − − − − − − − − − − − − − − − − − − − − − − − − − − − − − − − − − *CT Tax Registration Number must be included for parent and all taxable members. Enter the total number of members in this combined unitary return. Enter the total number of taxable members in this combined unitary return. Visit us at portal.ct.gov/DRS for more information. Form CT-1120CU Page 3 of 7 (Rev. 12/23) 1120CU 1223W 03 9999 Connecticut Tax Registration Number Column A Taxable Member #: PART I – Combined Group Total Tax Column B Taxable Member #: Column C Taxable Member #: Corporation name: Combined Group Total 1. Tax on combined group net income from Form CT‑1120CU‑NI, Part III, Line 14. .00 2. Tax on combined group minimum tax base from Form CT‑1120CU‑MTB, Line 14. .00 .00 .00 .00 3. Enter the larger of Line 1 or Line 2.If greater than $2,500,000, complete Form CT‑1120CU-NCB. 4. Aggregate maximum tax: If Line 3 exceeds $2,500,000, enter the amount from Form CT‑1120CU‑NCB, Part III, Line 5. Otherwise, enter zero (“0”). 5. If Line 4 is zero (“0”), enter the amount from Line 3. Otherwise, enter the lesser of Line 3 or Line 4. On Lines 6a, 6b, and 6c, enter each taxable member’s share of amount shown on Line 5, as applicable: 6a. If amount on Line 5 is based on combined group net income from Line 1, enter the corresponding amounts in each column as reported on Form CT‑1120CU‑NI, Part III, Line 13. Otherwise leave Line 6a blank. .00 .00 .00 6b. If amount on Line 5 is based on combined group minimum tax base from Line 2, enter the corresponding amounts in each column as reported on Form CT‑1120CU‑MTB, Line 10 (or Line 12, if applicable). Otherwise leave Line 6b blank. .00 .00 .00 6c. If amount on Line 5 is based on the aggregate maximum tax from Line 4, enter the corresponding amounts in each column as reported on Form CT‑1120CU‑NCB, Part III, Line 9. Otherwise leave Line 6c blank. .00 .00 .00 7. Surtax: Multiply each applicable tax amount on Line 6a, Line 6b, or Line 6c, by 10% (.10). If the tax amount in any column is $250, enter zero (“0”). Enter the total of all columns on Line 7 in Combined Group Total column. 8. Recapture of tax credits: Enter the total of all columns on Line 8 in Combined Group Total column. .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 9. Total tax: Add Lines 6a, 6b, or 6c, and Lines 7 and 8. Enter the amount in each column on Part II, Line 1, and enter the total of all columns on Line 9 in Combined Group Total column. Enter the Combined Group Total on Part III, Line 1. Visit us at portal.ct.gov/DRS for more information. Form CT-1120CU Page 4 of 7 (Rev. 12/23) 1120CU 1223W 04 9999 Column D Taxable Member #: Connecticut Tax Registration Number Column E Taxable Member #: Column F Taxable Member #: Column G Taxable Member #: Column H Taxable Member #: 1. 2. 3. 4. 5. 6a. .00 .00 .00 .00 .00 6b. .00 .00 .00 .00 .00 6c. .00 .00 .00 .00 .00 7. .00 .00 .00 .00 .00 8. .00 .00 .00 .00 .00 9. .00 .00 .00 .00 .00 Visit us at portal.ct.gov/DRS for more information. Form CT-1120CU Page 5 of 7 (Rev. 12/23) 1120CU 1223W 05 9999 Connecticut Tax Registration Number PART II – Combined Group Unitary Tax Credit Computation Column A Column B Taxable Member #: Column C Taxable Member #: Column D Taxable Member #: Taxable Member #: Corporation name: 1. Enter each member’s separate tax liability as reported on Part I, Line 9. .00 .00 .00 .00 2. Enter the lesser of Line 1 multiplied by 50.01% (.5001) or Line 1 minus $250. If negative, enter zero (“0”). .00 .00 .00 .00 3. Tax credits applied. Do not exceed the amount reported on Line 2 in any column. .00 .00 .00 .00 4. Subtract Line 3 from Line 1. .00 .00 .00 .00 .00 .00 .00 .00 6. Excess credit utilization. Do not exceed the amount reported on Line 5 in any column. .00 .00 .00 .00 7. Add Line 3 and Line 6 in each column. .00 .00 .00 .00 5. Enter the lesser of Line 1 multiplied by 19.99% (.1999) or Line 4 minus $250. If negative, enter zero (“0”). .00 8. Combined unitary tax credits: Add the amounts in each column on Line 7 and enter the total here and on Part III, Line 2. Combined Unitary Group Net Operating Loss Summary 1. Total apportioned net operating loss applied by combined unitary group members in 2023 from Form CT-1120CU-NI, Part III, Line 11. 1. .00 2. Total apportioned net operating loss carryover available for use in 2024 by all combined unitary group members. 2. .00 1. PE credit carryforward from 2022. 1. .00 2. Enter the sum of 2023 PE credits reported in each column on 2023 Form CT-1120CU-MI, Part I, Line 10. 2. .00 3. Total 2023 PE credit available. Add Line 1 and Line 2. 3. .00 4. PE credit applied in 2023 from Form CT-1120CU, Part III, Line 4. 4. .00 5. PE credit carryforward: Subtract Line 4 from Line 3. 5. .00 Combined Unitary Group Pass-Through Entity (PE) Tax Credit Summary DECLARATION: I declare under the penalty of law that I have examined this return and, to the best of my knowledge and belief, it is true, complete, and correct. I understand the penalty for willfully delivering a false return or document to the Department of Revenue Services (DRS) is a fine of not more than $5,000, imprisonment for not more than five years, or both. The declaration of a paid preparer other than the taxpayer is based on all information of which the preparer has any knowledge. Sign Here Keep a copy of this return for your records. Corporate officer’s name (print) Title Paid preparer’s name (print) Firm’s name and address Corporate officer’s signature Date M M - D D - Y Y Y Y Telephone number Paid preparer’s signature Firm’s FEIN May DRS contact the preparer shown below about this return? Date M M - D D - Y Y Y Y Visit us at portal.ct.gov/DRS for more information. Yes No Preparer’s SSN or PTIN Telephone number Form CT-1120CU Page 6 of 7 (Rev. 12/23) 1120CU 1223W 06 9999 Column E Connecticut Tax Registration Number Column F Taxable Member #: Column G Taxable Member #: Column H Taxable Member #: Column I Taxable Member #: Taxable Member #: 1. .00 .00 .00 .00 .00 2. .00 .00 .00 .00 .00 3. .00 .00 .00 .00 .00 4. .00 .00 .00 .00 .00 5. .00 .00 .00 .00 .00 6. .00 .00 .00 .00 .00 7. .00 .00 .00 .00 .00 Visit us at portal.ct.gov/DRS for more information. Form CT-1120CU Page 7 of 7 (Rev. 12/23) 1120CU 1223W 07 9999 Connecticut Tax Registration Number Schedule KU – Combined Unitary Tax Credits Attach 2023 Form CT-1120K for each member claiming, using, or sharing a business tax credit and enter the combined credit totals. Column A Carryback Amount Tax Credits With Carryback Provisions Column B Amount Applied Column C Carryforward Amount 1. Neighborhood Assistance. 1. .00 .00 2. Housing Program Contribution. 2. .00 .00 Tax Credits Without Carryback or Carryforward Provisions 3. Apprenticeship Training. 3. .00 4. Manufacturing Facility Credit for Facilities located in a Targeted Investment Community/Enterprise Zone. 4. .00 5. Machinery and Equipment. 5. .00 6. Service Facility. 6. .00 7. Student Loan Payment. 7. .00 8. Film Production. 8. .00 9. Digital Animation. 9. .00 10. .00 10. Film Production Infrastructure. Tax Credits With Carryforward Provisions 11. Housing Program Contribution. 11. .00 .00 12. Research and Experimental Expenditures. 12. .00 .00 13. Research and Development. 13. .00 .00 14. Fixed Capital Investment. 14. .00 .00 15. Human Capital Investment. 15. .00 .00 16. Insurance Reinvestment Fund. 16. .00 .00 17. Reserved for future use. 17. 18. Historic Homes Rehabilitation. 18. .00 .00 19. Donation of Land. 19. .00 .00 20. Historic Structures Rehabilitation. 20. .00 .00 21. Historic Preservation. 21. .00 .00 22. Urban and Industrial Site Reinvestment. 22. .00 .00 23. Green Buildings. 23. .00 .00 24. Historic Rehabilitation. 24. 25. Electronic Data Processing Equipment Property Tax Credit. .00 .00 25. .00 .00 .00 .00 .00 26. Add the amounts in Column A, Column B, 26. and Column C. Visit us at portal.ct.gov/DRS for more information.
Form CT-1120 CU
More about the Connecticut Form CT-1120 CU Corporate Income Tax Tax Return TY 2023
We last updated the Combined Unitary Corporation Business Tax Return in February 2024, so this is the latest version of Form CT-1120 CU, fully updated for tax year 2023. You can download or print current or past-year PDFs of Form CT-1120 CU directly from TaxFormFinder. You can print other Connecticut tax forms here.
eFile your Connecticut tax return now
eFiling is easier, faster, and safer than filling out paper tax forms. File your Connecticut and Federal tax returns online with TurboTax in minutes. FREE for simple returns, with discounts available for TaxFormFinder users!
File Now with TurboTaxRelated Connecticut Corporate Income Tax Forms:
TaxFormFinder has an additional 85 Connecticut income tax forms that you may need, plus all federal income tax forms. These related forms may also be needed with the Connecticut Form CT-1120 CU.
| Form Code | Form Name |
|---|---|
| Form CT-1120 A-LP | Corporation Business Tax Return Apportionment of Limited Partnership Interests |
| Form CT-1120 Instructions | Connecticut Corporation Business Tax Instructions |
| Form CT-1120X | Amended Corporation Business Tax Return |
| Form CT-1120 | Corporation Business Tax Return |
| Form CT-1120 EXT | Application for Extension of Time to File Connecticut Corporation Tax Return |
| Form CT-1120 CC | Authorization and Consent to be Included in a Combined Return |
| Form CT-1120 ES | Estimated Corporation Business Tax Payment Coupons |
| Form CT-1120 A-BMC | Corporation Business Tax Return Apportionment Computation - Motor Bus and Motor Carrier Companies |
| Form CT-1120 A-BPE | Corporation Business Tax Return Apportionment Computation - Broadcasters and Production Entities |
| Form CT-1120 A-CCA | Corporation Business Tax Return Apportionment Computation of Income Credit Card Activities |
View all 86 Connecticut Income Tax Forms
Form Sources:
Connecticut usually releases forms for the current tax year between January and April. We last updated Connecticut Form CT-1120 CU from the Department of Revenue Services in February 2024.
Form CT-1120 CU is a Connecticut Corporate Income Tax form. Like the Federal Form 1040, states each provide a core tax return form on which most high-level income and tax calculations are performed. While some taxpayers with simple returns can complete their entire tax return on this single form, in most cases various other additional schedules and forms must be completed, depending on the taxpayer's individual situation, to create a complete income tax return package.
About the Corporate Income Tax
The IRS and most states require corporations to file an income tax return, with the exact filing requirements depending on the type of company.
Sole proprietorships or disregarded entities like LLCs are filed on Schedule C (or the state equivalent) of the owner's personal income tax return, flow-through entities like S Corporations or Partnerships are generally required to file an informational return equivilent to the IRS Form 1120S or Form 1065, and full corporations must file the equivalent of federal Form 1120 (and, unlike flow-through corporations, are often subject to a corporate tax liability).
Additional forms are available for a wide variety of specific entities and transactions including fiduciaries, nonprofits, and companies involved in other specific types of business.
Historical Past-Year Versions of Connecticut Form CT-1120 CU
We have a total of thirteen past-year versions of Form CT-1120 CU in the TaxFormFinder archives, including for the previous tax year. Download past year versions of this tax form as PDFs here:
2016 Form CT-1120 CU
CT-1120CU, 2016 Combined Unitary Corporation Business Tax Return
2015 Form CT-1120 CU
CT-1120CR, 2015 Combined Corporation Business Tax Return
2014 Form CT-1120 CU
CT-1120CR, 2014 Combined Corporation Business Tax Return
2013 Form CT-1120 CU
CT-1120CR, 2013 Combined Corporation Business Tax Return
2012 Form CT-1120 CU
CT-1120CR, 2012 Combined Corporation Business Tax Return
2011 Form CT-1120 CU
CT-1120CR, 2011 Combined Corporation Business Tax Return
TaxFormFinder Disclaimer:
While we do our best to keep our list of Connecticut Income Tax Forms up to date and complete, we cannot be held liable for errors or omissions. Is the form on this page out-of-date or not working? Please let us know and we will fix it ASAP.