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Connecticut amended 2026
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- Click ‘Get Form’ to open the Connecticut Amended form in the editor.
- Begin by entering your employer or payer name, Connecticut Tax Registration Number, and Federal Employer Identification Number (FEIN) in the designated fields.
- Select the type of form you are amending by checking the appropriate box. Enter the calendar year and, if applicable, the quarter you are amending.
- In Column A, input the amounts as originally reported. In Column B, indicate any net changes (increases or decreases). Finally, in Column C, enter the corrected amounts.
- Complete the Explanation of Changes section on Page 2 by detailing each change made and its reason.
- Sign and date the declaration section at the bottom of Page 2. Ensure that all required signatures are included before submission.
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| Versions | Form popularity | Fillable & printable |
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| 2024 | 4.5 Satisfied (47 Votes) | |
| 2023 | 4.8 Satisfied (50 Votes) | |
| 2021 | 4.5 Satisfied (45 Votes) | |
| 2020 | 4.8 Satisfied (57 Votes) | |
| 2017 | 4.3 Satisfied (43 Votes) | |
| 2016 | 4.3 Satisfied (97 Votes) | |
| 2015 | 4.4 Satisfied (237 Votes) | |
| 2013 | 4.3 Satisfied (43 Votes) | |
| 2012 | 4 Satisfied (48 Votes) | |
| 2010 | 4 Satisfied (38 Votes) | |
| 2009 | 4.2 Satisfied (58 Votes) |
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Related links
If your taxable year or method of accounting is changed for federal income tax purposes, the same change must be made for Connecticut income tax purposes.Read more
This amended return is accurate based on the corrected Federal return, because it increases Federal AGI by $1,500. Line 10, net increase of income tax = $123.Read more
Mar 22, 2026 Alabama passed a consumer data privacy bill, Connecticut dropped a sweeping CTDPA amendment, and Colorado advanced kids digital protections