Connecticut Income Taxes
Prepare and e-file your 2024 year Connecticut state tax return - resident, nonresident, or part-year resident returns - together with your IRS return now via eFile.com.
- Keep in mind, the IRS and the CT state tax agencies require you to e-file a federal income tax return at the same time you e-file your Connecticut state tax return. This is not an eFile.com policy but an IRS and state agency policy. See detailed instructions on how you can only prepare and mail in - not eFile - an Connecticut Tax Return- here via eFile.com.
- CT taxes are generally due when the IRS return is due, thus you should e-file them together to avoid any late penalties. This way, you do not need to worry about mailing anything.
- Get your IRS and CT returns filed online on eFile.com! Start and eFileIT.
CT Tax Help and Resources
Prepare only a CT state return without an IRS return.
Where Is Your Connecticut Tax Refund Money?
Where Is Your IRS Refund?
Connecticut Income Tax Extension
Connecticut Income Tax Amendment
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.
Connecticut Income Tax Brackets
Connecticut Income Tax Forms
Connecticut Income Tax Code
Connecticut Marriage Penalty
Start Federal and Connecticut Tax Returns
e-File These Connecticut State Tax Forms
Prepare and e-File these state forms for the 2024 Tax Year 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.
CT-1040ES - Connecticut Estimated Connecticut Income Tax Payment Coupon for Individuals
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 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. See 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.
TurboTax® is a registered trademark of Intuit, Inc.
H&R Block® is a registered trademark of HRB Innovations, Inc.