File Returns, Make Payments
A Tax preparer who is registered as a Third Party/Bulk Filer (TPBF) can use the Taxpayer Service Center (TSC) to file, pay, and administer client's information.
Third Party Bulk Filers (TPBF) are tax preparers who prepare returns for multiple clients or multiple locations for the same client. These preparers have registered as a Third Party Bulk Filer with DRS and been assigned the ability to file tax returns on behalf of other taxpayers. If you have been assigned the access rights of a TPBF, you will have the option to key in the information for one client at a time, upload a file for multiple taxpayers, or submit a combined filing for multiple withholding tax payments (CT-WH) for your clients with a single logon using the same bank account. You will need to log into the Taxpayer Service Center (TSC) to bulk file returns.
If you have not yet registered but would like to become a Third Party Bulk Filer, click on the link below to download the application form.
In choosing this option, you will be uploading a file to DRS. DWI is a file import process that allows you to dynamically define a file. You will prepare a spreadsheet with your client’s figures. Each column of your spreadsheet will represent a line item from a return you will need to report and each row will represent a different taxpayer. You can arrange the columns in any order, but then you must verify the layout is correct when you upload the file through the TSC. Once uploaded, we will review your file for errors, and provide confirmation numbers for all accepted returns. If a return does have errors, we will provide you a list of the failed records with an explanation. Simply correct the file and resubmit only the failed records that you did not receive a confirmation number for. Visit for a list of the DWI Error Codes.
Key and Send
Selecting this option allows you to key in the information for your client’s one at a time. If they owe money, you will be both filing and paying for a client’s return one at a time. This process closely resembles how an individual business taxpayer would use the TSC to file and pay their taxes due.
Combined Filing (eligible form: Form CT-WH)
This bulk filing option is limited to the Form CT-WH only. This feature allows up to 25 different tax registration numbers to have payroll withholding taxes submitted with a single logon. You will enter the tax registration number, date payroll was paid, and the CT tax withheld for each client. Note: You must use the same bank account number for all tax registration numbers entered.