Connecticut Income Taxes

efile Connecticut tax return
"The Constitution State"

Prepare and e-File your current Connecticut State Tax return - resident, nonresident, or part-year resident returns - together with your IRS return now via

  • State return only regulations*): Per IRS and Connecticut state tax agency regulation - not - you can NOT just prepare and e-File a state returns (with the exception of California) without also eFiling the IRS return on the same platform. If you have filed your federal return already, you can prepare an Connecticut state return on and then download, print and sign the return before you mail in. Instructions on how to ONLY prepare and not also e-File Connecticut and/or other state tax returns.
Connecticut State Income Tax Rate: 6.99%
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
Where Is Your Connecticut Tax Refund Money
Step 1: Sign into your account and check acceptance by the Tax Agency.
Step 2: Check your Connecticut Tax Refund Status.
Where is Your IRS Refund?
Step 1: Sign into your account and check acceptance by the IRS.
Step 2: Check your IRS Tax Refund Status.
Connecticut Income Tax Extension
Connecticut Income Tax Amendment
How to correct a rejected Tax Return
If your CT Tax Return was rejected by the CT Tax Agency - not - instructions on how to correct a rejected Connecticut Tax Return.
How to Pay Income Taxes
Connecticut, IRS Late Filing, Tax Payment Penalties
1. Outstanding Tax Balance after Original Deadline: 10% penalty and 1% interest rate for each month or fraction of a month until payment is made.
4. IRS Penalties: Calculate and Estimate your potential IRS Income Tax Return Penalties.
CT Tax Return Mailing Addresses
Find various Connecticut Mailing Addresses for tax returns, tax amendments, and tax payments.
Connecticut Income Tax Brackets
Connecticut Income Tax Forms
Connecticut Unemployment Benefits
Unemployment benefits is taxed to the same extent as federal law in Connecticut.
Connecticut Marriage Penalty

Start Federal and Connecticut Tax Returns

E-File These Current Connecticut State Tax Forms

Prepare and e-File these state forms for the Current Tax Year in conjunction with your Federal and State Income Tax Return. As you proceed through the tax interview on, 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.

CT Tax Form Current Tax Year
CT-1040ES - Connecticut Estimated Connecticut Income Tax Payment Coupon for Individuals
CT-W4 - Connecticut Employee's Withholding Certificate
CT-1040 EXT - Application for Extension of Time to File Connecticut Income Tax Return for Individuals
CT-1040NR/PY - Connecticut Non-Resident and Part Year Resident
CT-1040V - 2020 Connecticut Electronic Filing Payment Voucher
CT-1040X - Amended Connecticut Income Tax Return for Individuals
CT-2210 - Underpayment of Estimated Income Tax by Individuals, Trusts, and Estates
CT-6251 - Connecticut Alternative Minimum Tax Return - Individuals
CT-8822 - Change of Address
CT-8857 - CT Request for Innocent Spouse Relief
Form CT-1040 - Connecticut Resident Income Tax Return
Form OP-186 - Connecticut Individual Use Tax Return
Schedule CT-EITC - Connecticut Earned Income
Supplemental Schedule CT-1040WH - Connecticut Income Tax Withholding

* 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 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 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 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.