Connecticut registration and tax info

Having payroll issues? Learn how to troubleshoot blocked payroll.

Setting up payroll in Connecticut for the first time

Before you can pay employees in a new state, you must register with the state’s tax agencies. This lets you file and pay the right taxes.

🎥 Watch a quick video to learn how registering in a new state works
📘 See our blog for full state business guides
🤝 Let Gusto register for you

Use the dropdowns below to learn more. Use CMD + F (or CTRL + F) to search for words in the article.

Let us register for you

Gusto works with Middesk to help you register with tax agencies in new states.

For now, this includes: Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, Florida, Georgia, Hawaii, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, South Carolina, South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin, and Wyoming.

How it works—an overview

Get help registering for state taxes

We can help you register for state tax accounts after you:

Add a work address in the new state in Gusto.
Assign that work address to a new or existing employee.
Check your Home page for a to-do. If the state requires it, register with the Secretary of State and tell us when it's done.

Cost, timeline, and who can register

The cost, steps, and turnaround time depend on the state. Gusto will show you these details when you start the registration process.

Middesk cannot help if your company is:

A non-profit that’s not a 501(c)(3)
A business that left a PEO (Professional Employer Organization)
A business that bought another business already registered.
A business that changed its legal entity type (like from LLC to Corp)
A Limited Partnership (LP) or Limited Liability Partnership (LLP)

What the process looks like

You give us some basic business information.
Middesk will check your info.
Your registration is usually submitted within two business days.
- State registration with Middesk includes:
  - State income tax (withholding)
  - State unemployment insurance
- What's not included:
  - Local agency registration
  - Third-Party Agent (TPA) access or Power of Attorney (POA) authorization.
    - If setting up TPA requires online agency portal access:
      - If Middesk has to create an agency account to register your business, you can find the agency portal login details on the Taxes & compliance > Tax setup page in Gusto once registration is complete.
      - If Middesk does not need to create an account, but the agency requires TPA to be set up through their portal, you need to set up the agency portal accounts on your own.
- After we submit your registration, you may need to answer a verification call from the agency to confirm that the registration request is legitimate.
When Middesk gets your tax account information back after registering, they'll enter it in Gusto for you.

Third-Party Access (TPA) and Power of Attorney (POA)reminder

Some state agencies need Gusto to have TPA or a POA on file to file and pay your taxes. Usually, Middesk does not set this up, so you’ll have to do it yourself after registration.

Check the state registration articles to see if TPA or POA is needed and how to set it up. If there's no “Authorize Gusto” section, then TPA is not needed right now.

If setting up TPA requires online agency portal access:

If Middesk has to create an agency account to register your business, you can find the agency portal login details on the Taxes & compliance > Tax setup page in Gusto once registration is complete.
If Middesk does not need to create an account, but the agency requires TPA to be set up through their portal, you need to set up the agency portal accounts on your own.

Get started with state tax registration in Gusto

The cost, steps, and turnaround time depend on the state. Gusto will show you these details when you start the registration process.

Need help with registration questions?

If you’re not sure how to answer one of the registration questions, check Middesk’s Help Center or email them at [email protected].

How to get started with state tax registration in Gusto:

Sign in to Gusto.
Go to Taxes & Compliance and select Tax setup.
Under “[State name] Tax Setup”, find the "Let us help you register" banner and click Learn more.
- The state will only show up if you’ve added a company work address there and assigned an employee to it.
Review the price, process, and how long it'll take. We will not charge you until you send in your order.
- State registration with Middesk includes:
  - State income tax (withholding)
  - State unemployment insurance
- What's not included:
  - Local agency registration
  - Third-Party Agent (TPA) access or Power of Attorney (POA) authorization.
    - If setting up TPA or POA requires online agency portal access:
      - If Middesk has to create an agency account to register your business, you can find the agency portal login details on the Taxes & compliance > Tax setup page in Gusto once registration is complete.
      - If Middesk does not need to create an account, but the agency requires TPA to be set up through their portal, you need to set up the agency portal accounts on your own.
Click Get started on Middesk.
- Reminder: We can only register for you if you do not already have a state account.
Answer some questions about your business, like:
- Basic info
- Contact info
- Company details
- Address details
- Officer/owner info
- State-specific details
After you've entered the information, review all the info carefully on the “Review Information” page. Mistakes can delay things.
- Heads up: State agencies might add fees or take longer than expected. Middesk will notify you if that happens.
If everything looks good, click Continue to Gusto.
Before you submit the order, review the cost breakdown and total amount again.
- Middesk will start to process your order after you submit it. They'll email you with order updates, and we'll add the cost to your next monthly bill.
- At this time, we cannot support order cancellations or refunds.
Click Submit.
- Heads up: After we submit your registration, you may need to answer a verification call from the agency to confirm that the registration request is legitimate. If you do not complete this within 3–5 business days, the order will be canceled and refunded.

What to expect next

When Middesk gets your tax account information back after registering, they'll enter it in Gusto for you.
Each state and agency takes a different amount of time to process a registration. To estimate when your state tax account info will be available, check the Post Submission Questions in Middesk's help article.

Important: You may need to give Gusto access

Some states require you to give Gusto third-party access (TPA) or a Power of Attorney (POA) to your tax accounts. Middesk does not do this for you.

Check the state registration articles to see if TPA or POA is needed. If there's no “Authorize Gusto” or TPA section, it's not needed right now.
If TPA or POA is needed, and you need access to your online account:
- If Middesk created the account (to register your business), you can find the login info after registration is complete in Gusto under Taxes & compliance > Tax setup.
- If Middesk did not create the account, and the state still needs TPA, you must create the portal account yourself.

Need to make a change?

If you already submitted your info but need to fix something, email [email protected] to update it.

Check the status of your order

When your order is complete, you’ll get emails from Gusto and Middesk. They’ll detail the next steps, which include:

Reviewing registration details
Any other state-specific instructions

Before your order is done, you can check the order status in your Gusto account:

Sign in to Gusto.
Go to Taxes & Compliance select Tax setup.
Find the state headline, and just below it, view the order status. It could be:
- Tax registration in progress (not yet submitted to the state)
- We need more information
- The state is working on your order
- You have existing tax accounts
  - If we find you've already registered for taxes in the state, Middesk will cancel and refund the registration order. Work with the agency to find your tax account details and enter them in Gusto.
- Your registration has been completed
- Your order is on hold
- We could not complete your tax registration.
If there is action required, check your email for next steps.

How Gusto handles tax registration mail

For most states where tax registration info is sent by physical mail, here's what to expect:

Middesk receives agency mail during registration to collect tax details. Your tax account info is later sent to Gusto.
Gusto provides a digital mailbox where agency mail that was sent during registration can be viewed.
After registration is complete, the agency updates its mailing address to your business address for future mail.
- Important: In some cases, you'll need to take action to help update the address. We'll send an email or Home page to-do if any action is needed from you.

States—supported by Middesk—that send physical registration mail

Arizona, Delaware, Kansas, Kentucky, Maryland, Michigan, Montana, New Hampshire, Oklahoma, Washington, and West Virginia.

How to view your digital mailbox or tax account credentials

Sign in to your admin profile in Gusto.
Go to Taxes & Compliance and click Tax Setup.
Find the state where a registration order has been completed, and click Visit Middesk.
- This option will only appear for states that send physical mail.
Here's what you can see in the digital mailbox:
- Communications: View mail and other agency communication sent during registration or right after.
- Accounts: View tax account credentials by agency.

FAQs

Q: Can I run payroll before my registration is done?

A: Yes. You may be asked to enter tax rates and tax deposit frequencies, but you can use temporary info.

Important reminders

We cannot submit tax payments or filings until all tax account numbers are added in Gusto.
If you run payroll before finishing registration, you might get notices about late tax payments or filings. Any penalties are your responsibility.
If you’re only registering for unemployment tax and do not have your rate yet, use the new employer rate for your state in Gusto until you get the correct one. Update the rate once you get it.

Q: I need to change some of the registration information that was submitted. What do I do?

A: Email Middesk at [email protected].

Q: Can I use Gusto to register in a new state without a Federal Employer Identification Number (FEIN)? What if my business is merging or being acquired?

A: No, you need a FEIN in Gusto to get registration help for state taxes.

If your business is merging or being acquired, Middesk cannot help with registration. You'll need to work with a tax advisor and state agencies directly.

Q: What if I'm not liable for unemployment tax yet?

A: If you want Middesk to start setting up an unemployment account number before you're liable, you can:

Use today’s date as the first date the employee(s) in the new state will be paid.
Enter the start date of the quarter you expect to meet the liability threshold.
- Check the state’s liability info in the Register on your own section (go to the SUI dropdown). If there’s no info, contact the state agency directly.

Q: What do I do if the tax agency contacts me after the registration is submitted?

A: Respond to them. For some agencies, you may need to answer a verification call to confirm that the registration request is legitimate. If you do not complete this within 3–5 business days, the order will be canceled and refunded.

Q: Can Middesk help if the responsible party is international without an ITIN or SSN?

A: No. Middesk cannot help in this scenario, you'll need to register on your own.

Q: Why am I unable to enter 0% ownership for the responsible party or add a commercial owner?

A: Some states have a 1% minimum for the responsible party's ownership percentage. These states include ID, KS, MN, OH, SC, DC, DE, MD, NJ, NY, and RI.

You’ll need to place registration orders directly with Middesk outside of Gusto or register directly with the agency.

Some states require an individual owner to be listed. If you’re a non-profit or unsure, contact Middesk for help at [email protected].

Q: When will my tax account information be available?

A: Each state and agency takes a different amount of time to process a registration. To estimate when your state tax account info will be available, check the Post Submission Questions in Middesk's help article.

Q: Where can I find my tax information?

A: You can find your tax info in several places:

In Gusto: Click the Taxes & compliance section and select Tax setup, then scroll to state tax setup.
In your state’s online portal: Find your account details there.
- You may need to create accounts on your own, but Middesk does this when it's required to register. Go to the Post Submission Questions in the Middesk help article to see which agencies they'll create credentials for.
  - If Middesk has to create an agency account to register your business, you can find the agency portal login details on the Taxes & compliance > Tax setup page in Gusto once registration is complete.
By mail: Some agencies send tax info by mail. If that happens, Middesk will let you know, and you'll need to enter this info in Gusto.

Gusto’s state tax registration service does not contain tax, legal, financial, or HR advice. Since rules and regulations change over time and can vary by location, consult a lawyer, HR expert, or accountant for specific guidance.

Q: Does Middesk help with giving Gusto third-party access (TPA) or Power of Attorney (POA) for tax payments?

A: Some state agencies need Gusto to have TPA or POA access to file and pay your taxes. Usually, Middesk does not set this up, so you’ll have to do it yourself after registration.

Check the state registration articles to see if TPA or POA is needed and how to set it up. If there's no “Authorize Gusto” section, then TPA is not needed right now.

If setting up TPA or POA requires online agency portal access:

If Middesk has to create an agency account to register your business, you can find the agency portal login details on the Taxes & compliance > Tax setup page in Gusto once registration is complete.
If Middesk does not need to create an account, but the agency requires TPA to be set up through their portal, you need to set up the agency portal accounts on your own.

Q: Does Middesk help close state tax accounts?

A: No, you'll need to close the tax account yourself.

Q: Can I cancel my Middesk order?

A: At this time, we do not support order cancellations or refunds.

Q: What is Middesk's phone number?

A: To get support from Middesk, you must email them at [email protected]. They can help with registration-specific questions, or changing info that's already been submitted. For all other questions, you can message Gusto.

Click the dropdowns below to learn how to register with state agencies—don't forget to give Gusto the third-party access (TPA) we'll need to file and pay certain taxes on your behalf.

Connecticut tax agencies

Connecticut Department of Revenue Services – income tax withholding
Connecticut Department of Labor (DOL) – unemployment tax
Connecticut Paid Leave Authority – paid family medical leave

Withholding account registration—income tax

If you register online, on in-person, you'll get your CT Tax Registration Number and tax deposit schedule (filing frequency) in real time. You have to enter your account number in Gusto, but we'll default to using the fastest tax deposit schedule, weekly.

For everything you need to start a new business in Connecticut, check out the state's online business checklist.

Register with the CT Department of Revenue

Register online using myconneCT .
Scroll to the "Businesses" section and click New Business/Need a CT Registration Number?
Read about what you'll need to register, and when you're ready, scroll down and click Next.
Complete all remaining prompts to register.
Give Gusto third-party access (TPA) to the DOR.

New CT Registration Numbers are 12-digits, and the last three digits are always “000”. All previous 10, or 11-digit account numbers are still valid and do not need to be changed.

Enter the tax account information in Gusto

Once a valid Connecticut work address has been added in Gusto for one or more employees, you can add your tax account information:

Click the Taxes & compliance section and select Tax setup.
Scroll to the “Connecticut Tax Setup” headline and select Manage taxes.
Enter your Tax Registration Number—the last 3 digits are always “000”.
- All new CT Registration Numbers are now issued as a 12-digit number. All previous 10, or 11-digit numbers are still valid and do not need to be changed.
- As a reminder, you will not need to enter your assigned tax deposit schedule (filing frequency) because we'll default to the fastest deposit schedule of “weekly” for all customers.
- If you edit a tax account number after payments or filings have already been made, there may be tax implications. Learn how to pull reports in Gusto that can help you correct any historical tax issues related to tax account number updates.

State unemployment insurance tax (SUI) registration and paid family and medical leave

Your company becomes liable for state unemployment insurance tax once the company has:

Paid $1500 in wages during a calendar quarter or;
Had at least one Connecticut-employee working for any part of the week, for 20 or more different weeks during a calendar year.

Running payroll in Gusto before you're liable for SUI

If you need to run payroll and do not yet meet the above requirements, Gusto allows it. Enter the new employer rate for your state in Gusto in the meantime, and update the rate once you receive it.

You'll want to make sure during registration that the Connecticut Department of Labor knows when you plan to become liable—eventually, Gusto will need:

Your unemployment account number—required to file and pay taxes on your behalf.
Your company-specific unemployment tax rate—assigned by the agency.

Register for unemployment tax

Heads up: When creating a ReEmployCT account for the first time, you may be asked for an eight-digit registration number—your eight-digit registration number is your old Employer Account Number (EAN).

You'll only use your eight-digit registration number for creating your new account in the ReEmployCT system.
When entering your eight-digit registration number on the agency website, use the format: XX - XXXXX - 0.

Example: If your EAN was 76543210 in the old system, then you would enter 76-54321-0.

Once you have a ReEmployCT account, most transactions will require the new ten-digit EAN. Your ten-digit EAN is your old EAN followed by two, or three trailing zeroes.

Example: If your EAN was 9876543 in the old system, then you would enter 98-76543-0-00 for your ten-digit EAN in Gusto, or when you complete a transaction in ReEmployCT.

You should receive your CT Unemployment Number and company-specific unemployment rate instantly, followed by a confirmation letter in the mail within one week.

Learn about registration requirements on the CT Department of Labor website.
Start to register your business online by using the ReEmployCT system.
Next steps are based on whether you're a new, or existing employer—make a selection and complete the rest of registration.
- If you have questions, call the Employer Status Unit at (860) 263-6550.
Give Gusto third-party access (TPA) to the DOL.

Enter the tax account information in Gusto

Once a valid Connecticut work address has been added in Gusto for one or more employees, you can add your tax account information:

Click the Taxes & compliance section and select Tax setup.
Scroll to the “Connecticut Tax Setup” headline and select Manage taxes.
Enter your unemployment account number and unemployment tax rate.
- Enter your ten-digit Employer Account Number (EAN) in Gusto as ##-#####-0-00.
  - If you only have a seven-digit number: Enter three trailing zeros at the end.
  - If you have an eight-digit number: Enter two trailing zeros at the end.
- Your unemployment rate can be found online, or on the bottom right of the Statement of Experience Account notice that you receive on an annual basis from the DOL.
  - Learn how to update your rate.
- If you edit a tax account number after payments or filings have already been made, there may be tax implications. Learn how to pull reports in Gusto that can help you correct any historical tax issues related to tax account number updates.

If you do not know your unemployment account number and rate, call the agency at (860) 263-6550.

Connecticut Paid Family and Medical Leave

Gusto supports Connecticut's paid family and medical leave program—we deduct 0.5% from CT employee payrolls. You still need to register, but Gusto uses your Federal Employer Identification Number (FEIN) to file and pay the tax, so we will not need the CT "PFML account ID" you'll receive once you register.

Find account numbers and rate info (if you're already registered)

If you've already registered in the state, you'll need to enter your tax account details in Gusto.

You'll need to be registered with one or more of the below agencies in order for Gusto to file and pay taxes on your behalf:

Connecticut Department of Revenue Services – income tax withholding
Connecticut Department of Labor (DOL) – unemployment tax
Connecticut Paid Leave Authority – paid family medical leave

If you still need to register, click the applicable dropdown above in this article.

Find your withholding (income) tax account number

If you've run payroll in Connecticut previously, you can find your withholding account number by:

Checking notices received from the Department of Revenue or;
Calling the agency at (860) 297-5962.

All new CT Registration Numbers are 12-digit numbers. All previous 10, or 11-digit numbers are still valid and do not need to be changed.

Reminder: The last three digits are always "000".

As a reminder, you will not need to enter your assigned tax deposit schedule (filing frequency) because we'll default to the fastest deposit schedule of “weekly” for all customers.

Don't forget to give Gusto third-party access (TPA) to the DOR.

Find your unemployment account number, unemployment rate, and information about paid family and medical leave

Unemployment account number and rate

You can find your Employer Registration Number and unemployment rate by:

Checking notices received from the Department of Labor or;
Calling the agency at (860) 263-6550.

Enter your ten-digit Employer Account Number (EAN) in Gusto as ##-#####-0-00.

If you only have a seven-digit number: Enter three trailing zeros at the end.
If you have an eight-digit number: Enter two trailing zeros at the end.

If you don't have your assigned rate yet, enter the new employer rate for your state in Gusto in the meantime—update the rate once you receive it.

Don't forget to give Gusto third-party access (TPA) to the DOL.

Paid Family and Medical Leave

Gusto supports Connecticut's paid family and medical leave program—we deduct 0.5% from CT employee payrolls. You still need to register, but Gusto uses your FEIN to file and pay the tax, so we will not need the CT PFML account ID you'll receive once you register.

Enter the tax account information in Gusto

Once a valid Connecticut address has been added in Gusto for one or more employees, you can add your tax account information:

Click the Taxes & compliance section and select Tax setup.
Scroll to the “Connecticut Tax Setup” headline and select Manage taxes.
Enter the applicable account numbers and rates.
- New CT Registration Numbers (for withholding) are 12-digits—all previous 10, or 11-digit numbers are still valid and do not need to be changed.
  - The last three digits of a withholding account number are always "000".
- Enter your unemployment account number and unemployment tax rate.
  - Enter your ten-digit Employer Account Number (EAN) in Gusto as ##-#####-0-00.
    - If you only have a seven-digit number: Enter three trailing zeros at the end.
    - If you have an eight-digit number: Enter two trailing zeros at the end.
  - Your unemployment rate can be found online, or on the bottom right of the Statement of Experience Account notice that you receive on an annual basis from the DOL.
    - Learn how to update your rate.
- As a reminder, you will not need to enter your assigned withholding tax deposit schedule (filing frequency) because we'll default to the fastest deposit schedule of “weekly” for all customers.
- If you edit a tax account number after payments or filings have already been made, there may be tax implications. Learn how to pull reports in Gusto that can help you correct any historical tax issues related to tax account number updates.

Giving Gusto third-party authorization (TPA)

In order for Gusto to keep your Connecticut tax information up-to-date and help troubleshoot tax issues, we'll need you to authorize Gusto as your third-party agent (TPA) in Connecticut. Give Gusto TPA for the agencies below:

The CT Department of Revenue (DOR) – withholding tax
The CT Department of Labor (DOL) – unemployment tax

Authorizing Gusto with the CT DOR (withholding tax)

Step one: Check to see if your myconneCT portal shows “Withholding Tax”

Sign in to your myconneCT account.
Click your business name.
Under your Accounts tab, check if “Withholding Tax” appears—if you do not see it, follow the steps below to add it.
- If you do see it, Gusto should be able to get the access we need as long as certain company details match (on the agency and Gusto's side):
  - Company Name
  - FEIN
  - Address

Step two: Add “Withholding Tax” to your DOR account

Follow the steps below or use this agency resource.

Sign in to your myconneCT account.
Click your business name.
Click More…
Under “Taxpayer Updates”, select Add Additional Accounts and Locations.
Read all the instructions, then click Next.
Select the applicable Registration Reason, then click Next.
Select Income Tax Withholding, then click Next.
Answer the questions on the next page, then click Next.
Click Next again.
Sign with your name and title, then click Submit.

Step three: Verify the information in Gusto matches what the agency has on file

Verify that the company information in Gusto matches exactly what the agency has on file. Compare the information in Gusto against your agency portal, or give the agency a call at (860) 297-5962.

Here's the information that should match:

Company Name
FEIN
Address

Authorizing Gusto with the CT DOL (unemployment tax)

To authorize Gusto, you'll first need to get set up in the new ReEmployCT agency portal. If you need help, call the agency directly at (860) 263-6470.

Head to the ReEmployCT portal to register or create a user ID and password for already registered employers.
- If you created a CT DOL employer account before July 5, 2022, under “Existing Employers”, click Create User ID and Password.
  - You'll be asked to enter the first eight digits of your Employer Account Number (EAN). The EAN is your 7-digit registration number assigned in the old system plus a trailing zero.
    - For example: 12-345-67 becomes 12-34567-0.
- If you're a new employer to CT DOL and need to register your business, under “New Employers” click Apply Here.
Gusto handles the rest of the requirements for setting up third-party authorization (TPA).
- In the coming months, the agency will build out a self-serve TPA flow for employers, at which point this article will be updated with the instructions for adding Gusto.

Once you have access, you'll be able to:

View, file, and amend tax returns
View and make payments
Maintain your addresses
Respond to audits
Close your account

Tax forms Gusto files in Connecticut

CT UC-5A (Connecticut Correction of EE Quarterly Earnings Report)
- Unemployment tax.
CT UC-2 (Connecticut Employer Contribution)
- Unemployment tax.
CT 941 (Connecticut Return for Annual Filer)
CT 941 DRS (Connecticut Quarterly W/H Return)
CT W3 (Connecticut Annual W/H Reconciliation)
State W2 (Wage and Tax Statement)
CT 941X (New Hire Report)

You can view forms in Taxes & Compliance > Tax documents. Switch between the tabs to find federal, state, W-2s, and 1099s.

Forms with an asterisk (*) may not show in your Gusto account—these are usually payment vouchers or coupons filed electronically.

To see what Gusto has paid on your behalf, run the Agency Payments report.

Agency website and contact info

Connecticut Department of Revenue Services
- Call (860) 297-5962
Connecticut Department of Labor, Employment Security Division
- Call (860) 263-6470

MyCTSavings

If MyCTSavings notifies you about enrollment, you can automate payroll deductions and streamline your plan administration by integrating your company’s auto-IRA with Gusto.

Learn how to close or reopen tax accounts here.