Illinois TPA + POA needed

Why is this important?

OnPay works with government entities on your behalf, reporting new hires to state labor departments, calculating tax rates, paying taxes and insurance contributions, and filing financial reports. To do this effectively, you will need to authorize us to act on your behalf with tax offices for each state where your company has a tax obligation.

For example, if you operate in both Illinois and Indiana, you must complete and return a power of attorney for both states.

Each tax office has its own authorization process, and may require different actions for you to take. We've detailed every step for each office below. We may need you to provide your tax registration information, or return a completed power of attorney (POA) form. In these cases, you'll see a button to "Submit a request". This request form is used to securely transmit your business information. 

Illinois Department of Revenue

Third-Party Access (TPA) for the Illinois Department of Revenue

1. Log In to your MyTax Illinois Account. You will have to register if you do not have an account with MyTax Illinois.
2. Select Manage My Profile
3. Select More...
4. Select Manage Third Party Access
5. Set Third Party Access as follows:
   • Allowed: Yes
   • Default Access: Third Party
   • Default Account Access: File & Pay

Once the above has been completed, submit a request for us to access your MyTax Illinois account, and provide the following information: 

• 9-digit Account Zip Code
• Last payment amount

If you cannot locate this information, contact the department by calling 800-732-8866.

Submit a request

Note: You will need your OnPay login credentials.

Power of Attorney (POA) for the Illinois Department of Revenue

1. Download and print the Illinois DOR POA 
2. Complete all fields regarding your business information
3. The taxpayer will need to sign at the bottom of the form (notarized)
4. Provide OnPay with a copy of your completed form

Download the POA form: 

Illinois DOR POA

Illinois Department of Employment Security

Third-Party Access (TPA) for the Illinois Department of Employment Security

1. Log In to your MyTax Illinois Account. If you do not have an account with MyTax Illinois, you will need to register for one.
2. Click View all account options hyperlink under "Unemployment Insurance".
3. Click Add Agent under "Power of Attorney (POA)"
4. Select Search by agent name
5. In the field beside "Enter Agent Name", type "OnPay" and click Next
6. Check the box marked "Select", and click Next
7. Ensure that the following options are selected:
   1. Full access to view and manage
   2. UI Employer Contribution Report
8. Click Next
9. Check the box to "Agree", and click Submit

Power of Attorney (POA) for the Illinois Department of Employment Security

• Download the IDES POA 
• Complete all fields regarding your business information at the top of the first page
• The taxpayer will need to sign at the bottom of the first page
• Provide OnPay with a copy of your completed form

Providing account information & completed forms

Submit a request and attach completed forms

To provide the information detailed in this article, click Submit a request, and log in using your OnPay credentials. The "Submit a request" form is the most secure way to transmit your company information and documents to us. 

Submit a request

Note: You will need your OnPay login credentials.

You can also submit a request anytime you need help

Requests can also be submitted by clicking the link at the bottom of any help article, or by starting a chat when logged into OnPay. Submitting a support request is the fastest and most secure way to get help with tax matters, technical advice, or any other support you may need from OnPay. 

POA forms to return:

• Illinois DOR POA 100 KB
• IDES POA.pdf 800 KB