Connecticut Tax Forms 2023
Printable State CT-1040 Form and CT-1040 Instructions
Connecticut state income tax Form CT-1040 must be postmarked by April 15, 2024 in order to avoid penalties and late fees. Printable Connecticut state tax forms for the 2023 tax year will be based on income earned between January 1, 2023 through December 31, 2023.
The Connecticut income tax rate for tax year 2023 is progressive from a low of 3% to a high of 6.99%. The state income tax table can be found inside the Connecticut 1040 instructions booklet. The Connecticut 1040 instructions and the most commonly filed individual income tax forms are listed below on this page.
Preparation of your Connecticut income tax forms begins with the completion of your federal tax forms. Several of the Connecticut state income tax forms require information from your federal income tax return, for example.
If you have not done so already, please begin with your federal Form 1040. Remember that federal tax forms 1040EZ and 1040A have been discontinued. Seniors age 65 and older have the option of filing federal Form 1040-SR this year.
What is Connecticut Form CT-1040?
Connecticut Form CT-1040 is used by full-year residents to file their state income tax return. The purpose of Form CT-1040 is to determine your tax liability for the state of Connecticut. Nonresident and part-year resident filers will complete Connecticut Form CT-1040NR/PY instead.
The State of Connecticut does not have an Easy Form (EZ) or Short Form.
Read the Who Must File
section of the CT-1040 instructions book to help determine if you should file as a full-year resident, part-year resident, or nonresident for tax year 2023.
Do I have to file a Connecticut tax return?
You must file a Connecticut tax return if your gross income exceeds the minimum specified for your filing status. For tax year 2023, Single residents must file if their gross income exceeds $15,000. Married residents filing jointly must file if their gross income exceeds $24,000.
Gross income means all income before deducting expenses that is reportable to the state of Connecticut. Even if your gross income is below the amount specified for your filing status, you may still have to file a Connecticut tax return. Other filing requirements include but are not limited to when:
- You had Connecticut income tax withheld.
- You made Connecticut estimated tax payments.
- You had a federal alternative minimum tax liability.
- You are claiming the Connecticut earned income tax credit (CT EITC).
Read the Who Must File
section of the CT-1040 instructions book to help determine if you should file an Connecticut income tax return for tax year 2023.
How to pay estimated taxes in Connecticut?
Connecticut Form CT-1040ES is used to pay estimated taxes. If you have taxable income from self-employment, interest, dividends, unemployment compensation, and pensions, you may have to pay estimated tax to the state of Connecticut.
Download Connecticut Form CT-1040ES from the list of forms in the table below on this page. The computation worksheet and instructions for Form CT-1040ES can be found inside the PDF file. At the bottom of page one you will find the Form CT-1040ES fillable voucher for the 2024 tax year. Open the PDF file and print the tax payment coupon and worksheet pages that you need for you records. Then, fill in and mail the payment coupon to the State of Connecticut Department of Revenue Services.
Connecticut estimated income tax payment due dates are the same as the federal Form 1040-ES payment due dates. For the 2024 tax year, estimated tax payments are due quarterly on the following dates: April 15, 2024; June 15, 2024; September 15, 2024; and Jan 15, 2025.
Where can I get Connecticut tax forms?
Printable Connecticut tax forms for 2023 are available for download below on this page. These are the official PDF files published by the State of Connecticut Department of Revenue Services, we do not alter them in any way. The PDF file format allows you to safely print, fill in, and mail in your 2023 Connecticut tax forms.
To get started, download the forms and instructions files you need to prepare your 2023 Connecticut income tax return. Then, open Adobe Acrobat Reader on your desktop or laptop computer. Do not attempt to fill in or print these files from your browser.
From Adobe Acrobat Reader use the Ctrl + O shortcut or select File / Open and navigate to your 2023 Connecticut tax forms. Open the files to read the instructions, and, remember to save any fillable forms periodically while filling them in. Print all Connecticut state tax forms at 100%, actual size, without any scaling.
Click the F
, Fi
, I
, and B
icons to download any Connecticut Form, Fillable Form, Instructions, or Booklet listed in the table below.
Booklets generally contain an assortment of printable tax forms and instructions.
2023 Connecticut Tax Form Downloads
| Form | Title | |
|---|---|---|
| CT-1040 | 2023 Form CT-1040 Connecticut Resident Income Tax Return |
|
| CT-1040NR/PY | 2023 Form CT-1040NR/PY Connecticut Nonresident / Part-Year Resident Income Tax Return |
|
| Schedule CT-1040AW | Part-Year Resident Income Allocation Worksheet | |
| Schedule CT-1040BA | Nonresident Business Apportionment | |
| Schedule CT-1040WH | Connecticut Income Tax Withholding | |
| Schedule CT-CHET | 529 College Savings Plan Contribution | |
| Schedule CT-EITC | Connecticut Earned Income Tax Credit | |
| Schedule CT-IT | Income Tax Credit Summary | |
| Schedule CT-SI | Income From Connecticut Sources (CT-1040NR/PY) | |
| CT-1040 EXT | Application for Extension of Time to File Connecticut Income Tax Return for Individuals | |
| CT-1040CRC | Claim of Right Credit | |
| CT-1040ES | 2023 Estimated Connecticut Tax Payment Coupon | |
| CT-1040TCS | 2023 Form CT-1040 TCS Tax Calculation Schedule | |
| CT-1040V | Connecticut Electronic Filing Payment Voucher | |
| CT-1040X | 2023 Amended Connecticut Income Tax Return | |
| CT-1127 | Application for Extension of Time for Payment | |
| CT-2210 | Underpayment of Estimated Income | |
| OP-186 | Connecticut Individual Use Tax Return | |
| Tax Tables | 2023 Connecticut Income Tax Tables to $102K | |
How do I track my Connecticut tax refund?
To track the status of your Connecticut income tax refund online, visit the State of Connecticut Department of Revenue Services website and use their Check Status Of Refund service. State of Connecticut Department of Revenue Services states on their website that refunds for electronically filed returns generally are issued within 4 business days of the receipt of the return. Paper tax forms mailed in take 10-12 weeks to process. The status of a paper income tax return will not be available until the forms have entered their system.
To track the status of your Connecticut income tax refund for 2023 you will need the following information:
- Social Security Number
- Amount of refund
The requested information must match what was submitted on your 2023 Connecticut Form CT-1040. To track prior year refunds, you will need to contact the State of Connecticut Department of Revenue Services service center by phone, email, or mail.
To contact the State of Connecticut Department of Revenue Services service center by phone or email, use the check your refund status link above. Alternatively, read or print the 2023 Connecticut Form CT-1040 instructions to obtain the proper phone number and mailing address.
Last updated: January 1, 2024
References:
- Individual Income Tax Forms. State of Connecticut, State of Connecticut Department of Revenue Services. Retrieved January 1, 2024.
- Chapter 229 Income Tax. Connecticut General Assembly, State of Connecticut. Retrieved January 1, 2024.