2025 Schedule CT-1040WH
Connecticut Income Tax Withholding Supplemental Schedule
Download or Print 2025 Connecticut Schedule CT-1040WH
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About Connecticut Schedule CT-1040WH
Connecticut Schedule CT-1040WH is a supplemental schedule for reporting Connecticut income tax withholding from Forms W-2, 1099, and Schedules CT K-1. Complete this schedule only if you have more than five withholding forms or Schedules CT K-1 with Connecticut income tax withheld.
Attach completed Schedule CT-1040WH to the back of Form CT-1040, Form CT-1040NR/PY, or Form CT-1040X when the schedule is required. The total from Line 3 is entered on the Connecticut withholding line for the return you are filing.
The 2025 Schedule CT-1040WH PDF includes withholding entry lines, instructions for Forms W-2, W-2G, 1099-MISC, 1099-NEC, 1099-R, and Schedule CT K-1, and reminders to attach the correct year schedule without staples. Do not use this schedule to report pass-through entity tax credits.
Connecticut Schedule CT-1040WH PDF Files by Year
Click any of the Connecticut Schedule CT-1040WH PDF links above to download, save, view, and print the file for the corresponding year. These free PDF files are unaltered and are sourced directly from the publisher.
Related Connecticut State Income Tax Forms
Need more state income tax forms? View the full 2025 Connecticut income tax forms list.
| Form Code | Form Name |
|---|---|
| Form CT-1040 | Connecticut Resident Income Tax Return |
| Form CT-1040NR/PY | Connecticut Nonresident and Part-Year Resident Income Tax Return |
| Form CT-1040X | Amended Connecticut Income Tax Return for Individuals |
| Form CT-4852 | Substitute for Forms W-2 and 1099-R |
Frequently Asked Questions (FAQ)
Here are answers to common questions about downloading, printing, completing, and attaching 2025 Connecticut Schedule CT-1040WH.
When is 2025 Connecticut Schedule CT-1040WH due?
Schedule CT-1040WH is filed with your Connecticut income tax return, so use the due date for the return you attach it to. For most 2025 Connecticut individual income tax returns, the due date is April 15, 2026. If you need more time to file, review the extension rules in the instructions, but pay any tax due by the original deadline to avoid penalties and interest.
Who should use Connecticut Schedule CT-1040WH?
Use Schedule CT-1040WH if you have more than five Forms W-2, Forms 1099, or Schedules CT K-1 showing Connecticut income tax withheld. The schedule may be used with Form CT-1040, Form CT-1040NR/PY, or Form CT-1040X when the withholding information does not fit on the main return.
Where do I attach Schedule CT-1040WH?
Attach completed Schedule CT-1040WH to the back of Form CT-1040, Form CT-1040NR/PY, or Form CT-1040X. The schedule instructions say to attach the correct year schedule and not to use staples.
What withholding forms are reported on Schedule CT-1040WH?
Schedule CT-1040WH reports Connecticut income tax withheld from Forms W-2, W-2G, 1099-MISC, 1099-NEC, 1099-R, and Schedules CT K-1. Do not include federal income tax withheld or income tax withheld for other states in the Connecticut withholding column.
Where do I enter the Schedule CT-1040WH total?
Add the Connecticut withholding amounts reported on Schedule CT-1040WH and enter the total on Line 3 of the schedule. Then enter that amount on the withholding line for your Connecticut return: Form CT-1040 Line 18f, Form CT-1040NR/PY Line 20f, or Form CT-1040X Line 70f.
Can I use Schedule CT-1040WH for pass-through entity tax credits?
No. Schedule CT-1040WH says not to use this schedule to report pass-through entity tax credits. Use the credit forms or schedules required by the Connecticut return instructions for pass-through entity tax credit reporting.
Last updated: August 1, 2026
References:
- Schedule CT-1040WH Connecticut Income Tax Withholding. State of Connecticut, Connecticut Department of Revenue. Retrieved August 1, 2026.
- Withholding Forms. State of Connecticut, Connecticut Department of Revenue. Retrieved August 1, 2026.
- Form CT-1040 Connecticut Resident Income Tax Return Instructions. State of Connecticut, Connecticut Department of Revenue. Retrieved August 1, 2026.
- Form CT-1040NR/PY Connecticut Nonresident and Part-Year Resident Income Tax Return Instructions. State of Connecticut, Connecticut Department of Revenue. Retrieved August 1, 2026.