The information below will guide you through the following:
- Understanding if you should be calculating Connecticut taxes
- Deciding which Connecticut taxes your company should register for
- Understanding what forms OnPay files
- Registering with the Connecticut Tax agencies
- Completing the forms necessary for OnPay to be able to file/pay on your behalf
- Entering necessary information into OnPay
Do you need to register for Connecticut Taxes?
- Do you have a business and/or employees residing in the State of Connecticut?
- Have you processed payroll in OnPay and have received warnings stating we are missing tax information?
- Have you received an email from an OnPay Tax Agent requesting certain Connecticut information?
If you answered yes to any of the questions above, you should continue with the registration and setup steps below.
WhichConnecticut Agencies should I register for?
- Connecticut Department of Revenue: You will need to register with this department if you have employees that both live and work in Connecticut, or for any employees that calculate Connecticut withholding taxes regardless of there they live/work. if your business is located outside of Connecticut, but your employees work or live in Connecticut you will likely need to register with this agency.
- Connecticut Department of Labor: You will need to register with this department if you have employees that work in Connecticut. If your business is located out of the state, but some of your employees primary work location is in Connecticut, you will likely need to register with this agency.
OnPay will use both the home address for each employee, plus the worksite assigned to each employee to decide which taxes should be calculated. OnPay uses reciprocity agreements between states to help decide where a certain employee's taxes are calculated according to those addresses.
Connecticut Department of Revenue (withholding assistance): 1-(860)-297-5962
- Register for your State Tax ID (also known as a CTREG number)
- Click here for more information on how to register your Connecticut business with the Department of Revenue
Connecticut Department of Labor (unemployment insurance assistance): 1-(860)-263-6000
- Register for your account ID and tax rate
If you are a new employer in the State of Connecticut, this information can be very useful in helping you get your company set up and registered. Please use the following contact information to speak to the departments about registration. Your company MUST be registered with each department before we can pay taxes on your behalf.
Tax Forms We File
- Form CT-WH: Monthly Withholding Return
- Form CT-941: Quarterly Withholding Reconciliation
- Form CT-W3: Annual Reconciliation/W-2 transmittal
- Connecticut Quarterly Tax and Wage Report
What information does OnPay need?
This information is required. If OnPay does not receive one or more pieces of the information/steps listed below, we may be unable to file/pay one or more of your tax returns. Please contact us if you have any questions.
What you need as a Connecticut Employer:
- Federal ID Number (EIN)
- Connecticut State Tax ID (CTREG): 10-digit number Ex: 0000000-000
- An ID in any other form is incorrect for the Department of Revenue. We must insist that you verify that the ID you have from the Department or Revenue is your CTREG number.
Once you provide is with your State Tax ID we can file and pay all of your Connecticut Department of Revenue taxes for you.
What we need from you as a Connecticut Employer:
- Federal ID Number (EIN)
- Connecticut Unemployment ID: 7-digit number Ex: 00-000-00
- If you have already set up and online account HERE then please provide us with the login credentials. If not we will set up an account for you.
- Once you follow the link choose the "Create an Account"
- You will need to have already registered your business with the Connecticut Department of Labor.
- To sign up for Online access please follow this link:
I am an existing Connecticut employer, where do I find the information to provide to OnPay?
If you are an employer with a history of payroll in Connecticut you have likely obtained the IDs and online accounts necessary for OnPay to process your tax filings.
Connecticut Department of Revenue:
- Withholding Tax Account Number: Existing employers can find your withholding account number on notices received from the DOR.
If you cannot locate this document or account number, please call the Connecticut Department of Revenue at 1 (860) 297-5962 and request the account number.
Connecticut Department of Labor:
- Unemployment Account Number: Existing employers can find your Employer Registration Number on notices received from the DOL
- Unemployment Tax Rate: This can be found in the righthand side of the Tax Rate Notice.
If you cannot locate one of the documents above, or the account number, please contact the Connecticut Department of Labor and request the account number.
Where do I enter the information in OnPay?
If you already have your tax information, or if you have obtained it using the steps above, please update the tax information in OnPay:
- Login to OnPay
- Select the Settings menu icon
- Select Payroll Tax
- View/Update your Withholding Tax ID, Withholding Tax Deposit Schedule, Unemployment Tax ID, Unemployment Rate (as a %), and any local tax IDs as required.
Once you have the following information, please email it to firstname.lastname@example.org:
- DOR: E-File Sign-On ID/E-File Access Code
- Completed Connecticut DOL POA found here.
Please reference each section below to identify any other information or steps required for OnPay to complete tax payments and filings on your behalf. If you are a new employer in the State of Connecticut, the following information can be very useful in helping get your company set up and registered.
Power of Attorney
What we need from you as an Connecticut Employer:
Please CLICK HERE for the Connecticut Power of Attorney forms and information on how to complete the forms. This will allow us to speak on your behalf, file, and make payments with the State of Connecticut. Please fax the completed Power of Attorney forms to 678-829-7291 or email to email@example.com.
Give us the Info
Once you have received all of this information from both the Department of Revenue and the Department of Labor please forward it on to us at firstname.lastname@example.org.
**If you have liabilities or employees for more than one state please follow the instructions found in the knowledge base for each state.**