CT-1065/CT-1120SI Supplemental Attachment: CT-1065/CT-1120SI Supplemental Attachment (Revision 2024-12)
Connecticut · Connecticut DRS · Used for tax years 2024
The 2024 Connecticut Form CT-1065/CT-1120SI Supplemental Attachment provides additional schedules for a pass-through entity’s return. It reports member composite return amounts, Connecticut-sourced income from subsidiary pass-through entities, member information, and members’ sha
Who files this form
Only a parent pass-through entity (PE) must complete Part 1, Schedule D, Connecticut-Sourced Income From Subsidiary PE(s). The supplied form does not state a general requirement for who must file the supplemental attachment.
What you'll need
Have the following information and referenced forms available for the parts you complete:
- The pass-through entity’s Connecticut Tax Registration Number.
- Member names, addresses, FEINs or SSNs, member numbers, member type codes, and capital ownership, profit-sharing, and loss-sharing percentages.
- Federal Schedule K-1 and Schedule CT K-1 for the amounts reported in Part 1, Schedule D.
- Schedule CT K-1, Part 5, Line 6, Column C, for members’ credits in Part 1, Schedule B.
- Form CT-PET, Part 1, Schedule D, Column I, for the PE tax credit reported in Part 8, Column B.
- Statements for other income or loss reported on Part 6, Line 11, and other deductions reported on Part 6, Line 13.
Common mistakes
- Using the wrong year’s form. The form warns that each edition is year-specific and that submitting the correct year’s form helps prevent processing delays. This edition is for 2024.
- Exceeding the PET credit limit. In Part 1, Schedule B, Column G cannot exceed Column F.
- Overlooking income limitations. Amounts in Part 1, Schedule D, Column B are subject to passive activity, at-risk, and capital loss limitations.
- Entering percentages in the wrong format. Part 4 requires capital ownership, profit-sharing, and loss-sharing percentages as decimals.
- Using negative numbers for Part 5 subtractions. Both additions and subtractions in Part 5 must be entered as positive numbers.
- Leaving out Connecticut modifications. Part 6 says to include the member’s share of Connecticut modifications from Part 5.
Questions people ask
How is Connecticut income tax liability calculated in Part 1, Schedule B?
Multiply Connecticut-sourced income in Column C by 6.99% (0.0699) to get Column D. Subtract the members’ credit in Column E from Column D to get the Connecticut income tax liability in Column F.
Where do I enter totals from the supplemental attachments?
Enter the totals from all supplemental attachments on Form CT-1065/CT-1120SI as follows:
- Part 1, Schedule B: totals for Columns C, D, E, and F go on Part 1, Schedule B, Line 9.
- Part 1, Schedule D: totals for Columns A, B, C, and D go on Part 1, Schedule D, Line 6.
- Part 8: totals for Columns B, C, D, and E go on Part 8, Line 10.
How do I calculate the total PE tax credit in Part 8?
Add Column B and Column C to get Column D. Column B uses the PE tax credit from Form CT-PET, Part 1, Schedule D, Column I. Column C uses the indirect PE tax credit from Part 1, Schedule D, Column D.
Which member types can have amounts entered in Part 8, Column E?
The form says to enter amounts from Column D in Column E for member type codes NI, NT, NE, and PE only.