Withholding Forms
Tables and Publications
| Name | Description | Revised Date | Due Date |
| 2019 Withholding Tax Tables | 12/2018 | N/A | |
| IP 2019(1) | Connecticut Circular CT Employer's Tax Guide | 02/2019 | N/A |
| IP 2019(7) | Is My Connecticut Withholding Correct? | 02/2019 | N/A |
| IP 2018(8) | Connecticut Tax Guide for Payers of Nonpayroll Amounts | 11/2018 | N/A |
| TPG-211 | 2019 Withholding Calculation Rules | 12/2018 | N/A |
Withholding Forms
| Name | Description | Revised Date | Due Date |
| CT-W4 | 2019 Employee's Withholding Certificate | 12/2018 | N/A |
| CT-941 | 2019 Connecticut Quarterly Reconciliation of Withholding | 09/2018 | 01/31/2019 |
| CT-941X | Amended Connecticut Reconciliation of Withholding | 12/2017 | |
| CT-8109 | 2019 Connecticut Withholding Tax Payment Form for Nonpayroll Amounts | 12/2018 | |
| CT-945 | 2018 Connecticut Annual Reconciliation of Withholding for Nonpayroll Amounts | 09/2018 | 01/31/2019 |
| CT-W3 | 2018 Connecticut Annual Reconciliation of Withholding | 09/2018 | 01/31/2019 |
| CT-1096 | 2018 Connecticut Annual Summary and Transmittal of Information Returns | 09/2018 | 01/31/2019 |
| CT-W4P | 2019 Withholding Certificate for Pension or Annuity Payments | 11/2018 | |
| CT-W4NA | 2019 Employees Withholding or Exemption Certificate-Nonresident Apportionment | 12/2018 | N/A |
| Schedule CT-1040WH | Connecticut Income Tax Withholding Supplemental Schedule | 12/2018 |
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Athletes & Entertainers
| Name | Description | Revised Date | Due Date |
| CT-588 | Athlete or Entertainer Request for Reduced Withholding | 02/2019 | |
| CT-590 | Athlete or Entertainer Request for Waiver of Withholding | 02/2019 | |
| CT-592 | Athlete or Entertainer Withholding Tax Statement | 12/2017 | |
| CT-945 ATHEN | 2018 Connecticut Annual Reconciliation of Withholding for Nonpayroll Amounts | 09/2018 | 01/31/2019 |
| CT-1096 ATHEN | 2018 Connecticut Annual Summary and Transmittal of Information Returns | 09/2018 | 01/31/2019 |
Household Employers
| Name | Description | Revised Date | Due Date |
| CT-941 HHE | 2018 Connecticut Reconciliation of Withholding for Household Employers | 09/2018 | |
| CT-W3 HHE | 2018 Connecticut Annual Reconciliation of Withholding for Household Employers | 09/2018 |
Information Returns
| Name | Description | Revised Date | Due Date |
| CT-8508 | Request for Waiver from Filing Information Returns Electronically | 10/2015 | |
| CT-6559 | Submitter Report for Form W-2 Compact Disc (CD) Filing | 12/2017 | |
| CT-6559A | Continuation Sheet for Form CT-6559, Submitter Report for Form W-2 Compact Disc (CD) Filing | 10/2009 | |
| CT-4804 | Transmittal of Information Returns Reported on Compact Disc (CD) | 12/2017 | |
| CT-4802 | Transmittal of Information Returns Reported on Compact Disc (CD) Continuation | 12/2017 | |
| CT-8809 | Request for Extension of Time to File Information Returns (For Forms W-2, W-2G, 1099-R, and 1099-MISC) | 11/2017 |
Information Return Publications
| Name | Description | Revised Date | Due Date |
| IP 2018(12.1) | 2018 Forms 1098, 1099-MISC, 1099-R, and W-2G - Electronic Filing Requirements for Tax Year | 12/2018 | 1/31/2019 |
| IP 2018(13) | 2018 Form W-2 Electronic Filing Requirements | 11/2018 | 1/31/2019 |