Table of Contents

W-2 E-Filing: Connecticut

Nina Tchistiakova Updated by Nina Tchistiakova

Due date

January 31

If the due date falls on a Saturday, Sunday, or legal holiday, the return will be considered timely if filed by the next business day.

E-filing threshold

Must E-file if 25 or more

Filing options

Electronic filing

Transmittal form

Upload the CT-W3 located in CFS Payroll System under "W-2/1099 Information Returns" -> "CT CT-W3 or CT-1096 -CSV File Upload to myconnectCT". First Create the W3 located right above the CSV File Upload. 

Required file name

CTTAX20XX.txt where XX is the tax year

E-filing website

https://drs.ct.gov/eservices/_/

Contact

E-Commerce Unit

860-297-4973

CT-eFile@ct.gov

Submitting files

Connecticut accepts electronic filing for current year and three Prior year filings.
Corrected W-2's can be submitted as a new original W-2. The state does not accept the W-2C for corrections.

Submit a W-2 file containing only the corrected W-2's. DO NOT include any W2's that are not being corrected. Please see: W-2 corrections as new original file.

Form CT-W3 is due the last day of January and will be completed as part of the electronic filing process when you upload Forms W-2. Do not mail in Form CT-W3.

Bulk Filer Forms myconneCT Filing Options

Electronic Filing Through myconneCT as a Third Party Bulk Filer Third Party Bulk Filers (TPBF) are tax preparers who prepare returns for multiple employers, or for multiple locations for the same employer.

For Forms W‑2 filed through myconneCT, corrected filings can only be done using the Standard login or Bulk Filer login

Standard employer login filing through myconneCT

1. Login to myconneCT.

2.Select View/File Returns and View Period Details.

3. Select W-2/CT-W3 Annual Reconciliation of Withholding, File Now, hyperlink.

4. Choose the Bulk file option. Then select the Standardized File Layout and upload your file.

Once uploaded the file will be reviewed for errors in real time. If the file is accepted you will receive a confirmation number for your records. If the file fails, you will receive a list of the failed records with an explanation. Simply correct the file and resubmit. There is no limit on the number of upload attempts.

Your Forms W‑2 are not successfully transmitted until myconneCT issues a confirmation number for Form CT‑W3.

Option 1: Single Client W-2 Upload

1. Login to myconneCT.

2. Click on the More... tab.

3. Locate the Bulk filing group and select the View Bulkfiler Menu hyperlink.

4. Locate the file file payroll withholding forms hyperlink.

5. Choose your upload selection Single Client Upload .

6. Click the Choose file button to attach the file from your computer and click next to upload.

Option 2 Multi Client W‑2 Upload

1. Login to myconneCT.

2. Click on the More... tab.

3. Locate the Bulk filing group and select the View Bulkfiler Menu hyperlink.

4. Locate the file file payroll withholding forms hyperlink.

5. Choose your upload selection Multi Client Upload.

6. Click the Choose file button to attach the file from your computer and click next to upload.

Once all Forms W-2 are successfully uploaded (Step 1) you will then need to upload the Form CT-W3 (Step 2) to complete the CT-W3/W-2 upload process.

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