What the Second Stimulus Payment Means For You

Tax Brackets, Rates and Standard Deductions in Connecticut

You can prepare and e-File your 2020 Connecticut Income Taxes here on eFile.com together with your Federal Income Tax Return. Information on how to only file a Connecticut Income Return.

Find Connecticut income tax forms, tax brackets and rates by tax year.

If you still need to file a return for a previous tax year, find the Connecticut tax forms below. You can complete and sign the forms here on eFile.com before you mail them to the CT Tax Agency. For Federal or IRS back taxes access the tax forms here.

Below find links to other important Connecticut income tax return information and other related features (e.g. tax extension, amendment, etc.)

Connecticut Income Tax Returns

Connecticut Income Taxes
Prepare only a CT State Return without an IRS return. Details
Step by Step instructions on how to only Prepare and Download - not eFile - State Returns on eFile.com.
File a 2020 Connecticut Tax Amendment
Connecticut Income Tax Forms
IRS Tax Brackets, Rates by Tax Year
Calculate and Estimate your IRS Income Tax Brackets and Rates with the eFile RATEucator.

Connecticut 2019 Income Bracket, Rate and Estimated Taxes Due

As you can see your income in Connecticut is taxed at different rates within the given tax brackets. Any income over $17,001 would be taxes at the highest rate of 5.75%.

Tax Rate
Income Range
Taxes Due
2%
$0 - $3,000
2% within Bracket
3%
$3,001 - $5,000
$60 + 3% within Bracket
5%
$5,001 - $17,000
$120 + 5% within Bracket
5.75%
$17,001 +
$720 + 5.75% within Bracket
Other State Income Tax Brackets: Compare State Tax Brackets, Rates
For your personal Effective IRS Tax Rate use the RATEucator Tool

2019 Connecticut Standard Deductions

Connecticut does not have a standard deduction 

Other Standard Deductions by State: Compare State Standard Deduction Amounts
IRS Standard Deduction: Federal Standard Deductions

E-File These 2020 Connecticut State Tax Forms

Prepare and e-File these state forms for 2020 in conjunction with your Federal and State Income Tax Return. As you proceed through the tax interview on eFile.com, the application will select the correct state forms for you. You can also select tax forms individually. All these forms will then be e-filed by you to the State Tax Agency. Instructions on how to only prepare a state income tax return.

Form/Schedule
Description
eFileIT Now*
Form CT-1040
Resident Income Tax Return
Form CT-1040ES
Estimated Connecticut Income Tax Payment Coupon for Individuals
Form CT-1040NR/PY
Nonresident/Part-Year Resident Tax Return
Form CT-1040V
Electronic Filing Payment Voucher
Form CT-2210
Underpayment of Estimated Income Tax by Individuals, Trusts, and Estates
Form CT-6251
Alternative Minimum Tax Return
Form CT-8822
Change of Address
Form CT-8857
Request for Innocent Spouse Relief
Form OP-186
Connecticut Individual Use Tax Return
Schedule CT-1040WH
Connecticut Income Tax Withholding Supplemental Schedule
Schedule CT-EITC
Connecticut Earned Income Tax Credit
Determines your paycheck CT Tax Withholding amount per employer.
Step 1: Complete and submit to your employer(s).
Step 2: Estimate, Calculate your IRS Tax Withholding now.
Payment Voucher for Individual e-filed Returns. Complete and submit to the CT Department of Revenue - address is on the form - with your payment.

* Due to IRS and State Tax Agency tax data sharing and validation requirements, you can only e-file a State Income Tax Return while also e-filing a Federal Income Tax Return. This is not an eFile.com created policy, but all online tax web sites have to adhere to this IRS/state issued tax data sharing policy. You can however prepare all 44 State Income Tax Returns on eFile.com if you have already e-Filed or filed your IRS return. Instructions on how you can ONLY prepare and file State Income Tax Return(s). Only on eFile.com can you prepare, file or e-file unlimited State Tax Returns for one low price and not pay for each State return like you would do on H&R Block® vs. TurboTax®. Dare to Compare Now.

2019 Tax Year Connecticut Tax Forms

Connecticut State Income Tax Forms for Tax Year 2019 (Jan. 1 - Dec. 31, 2019)  can no longer be prepared and e-filed. Complete the respective Form(s) below, sign, and mail them to the Connecticut Department of Revenue. In addition to filing Connecticut Forms you might also have to file the 2019 IRS Tax Return Forms.

Form/Schedule
Description
Resident Income Tax Return
Estimated Connecticut Income Tax Payment Coupon for Individuals
Nonresident/Part-Year Resident Tax Return
Electronic Filing Payment Voucher
Underpayment of Estimated Income Tax by Individuals, Trusts, and Estates
Alternative Minimum Tax Return
Change of Address
Request for Innocent Spouse Relief
Connecticut Individual Use Tax Return
Connecticut Income Tax Withholding Supplemental Schedule
Connecticut Earned Income Tax Credit
Tax Amendment

2018 Tax Year Connecticut Tax Forms

Connecticut State Income Tax Forms for Tax Year 2018 (Jan. 1 - Dec. 31, 2018)  can no longer be prepared and e-filed. Complete the respective Form(s) below, sign, and mail them to the Connecticut Department of Revenue. In addition to filing Connecticut Forms you might also have to file the 2018 IRS Tax Return Forms.

Form/Schedule
Description
Resident Income Tax Return
Estimated Connecticut Income Tax Payment Coupon for Individuals
Nonresident/Part-Year Resident Tax Return
Electronic Filing Payment Voucher
Underpayment of Estimated Income Tax by Individuals, Trusts, and Estates
Alternative Minimum Tax Return
Change of Address
Request for Innocent Spouse Relief
Connecticut Individual Use Tax Return
Connecticut Income Tax Withholding Supplemental Schedule
Connecticut Earned Income Tax Credit
Tax Amendment

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