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Form last updated: 03/2024. Please verify this is the current version before use.
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What is a CT-1040 used for?
Form CT-1040 is used by Connecticut residents to report their income and calculate their state tax obligations. It allows individuals to determine their tax liability and claim eligible deductions and credits.
Who needs to fill out a CT-1040 form
Connecticut residents who meet the filing requirements, such as having income above a certain threshold or having Connecticut tax withheld.
How to fill out a CT-1040 online?
Follow these steps to complete your CT-1040 form online.
Frequently Asked Questions
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Form CT-1040 is the income tax return for Connecticut residents, used to report income and calculate state taxes.
Form CT-1040 is generally due on or around April 15th, following the end of the tax year.
You can download Form CT-1040 from the Connecticut Department of Revenue Services website.
