Composite Income Tax Forms
| Name | Description | Revised Date |
| CT-1065/CT-1120 SI | 2025 Connecticut Composite Income Tax Return Instructions |
12/2025 |
| CT-1065/CT-1120SI | 2025 Connecticut Composite Income Tax Return | 12/2025 |
| Supplemental Attachment | 2025 CT-1065/CT-1120SI Supplemental Attachment | 12/2025 |
| CT-1065/CT-1120SI EXT | 2025 Application for Extension of Time to File Connecticut Composite Income Tax Return | 12/2025 |
| Schedule CT K-1 |
2025 Member's Share of Certain Connecticut Items - FILLABLE |
12/2025 |
| CT-1127 | Application for Extension of Time for Payment of Income Tax | 12/2025 |