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Connecticut Resident Income Tax
Jan 15, 2021 If you have filed federal Form 1310, you must file Form CT‑1040 by paper. For more information, see Claiming a Refund for a Deceased Taxpayer,
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CT-5.1 | Request for Additional Extension of Time to File
A taxpayer who files more than one type of tax return (for example, Forms CT-183 and CT-184 or Forms CT-3 and CT-186-E) must file a separate extension form for
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Form CT-3 General Business Corporation Franchise Tax
Content of Form CT-3. Part 1 General corporate information. Part 5 Calculation of investment capital for the current tax year.
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