Treasury IconIndividual Income Tax eServices Portal Help Center

  • Account Services Portal

    When you create an account, you only need to answer the shared secret questions one time per tax year. You can link your existing MILogin account from another state agency to IIT eService, or you can create credentials for the first time.

  • Inquiries Portal

    The Inquiries portal provides a way for you to ask questions, retrieve and review answers to your questions, and request copies of documents. We will ask you to provide your email address so we can communicate with you about your inquiry.

  • Guest Services Portal

    Each time you access a Guest Service option, you must answer questions from your tax return. We call these shared secret questions because Treasury has the answers to these questions based on information you provided on your tax return. We will also ask you to provide your email address so we can communicate with you.

Individual Income Tax Video Tutorials

  • IIT eServices: Where's My Refund
  • IIT eServices: Account Specific Inquiries
  • IIT eServices: Create an Account
  • IIT eServices: General Inquiries

Frequently Asked Questions (FAQ)

Error Handling Information

  • Technical Error Handling

    Technical Errors

    Technical errors are accompanied by an Error Code and Description on the screen. At the end of the Error Code, there is a 3-digit number. When calling Treasury providing that to the Customer Service representative that you speak to will expedite the process to get you back on track.

    eServices Technical error

  • Non-Technical Error Handling

    Non-Technical Errors

    Non-Technical errors will display both with a Message (i.e. No Match Found) and instructions on how to resolve those errors.

    eServices Non-Technical error

    Potential Errors and the Actions Required to Resolve Them

    Error Text Action Required
    Not Successful
    Contact Treasury at 517-636-4486.
    No Match Found,
    Try Again
    Click "Start Over" - this error indicates that you have provided a combination of information that doesn't match our records.
    Account Locked Please wait for 24 hours and try again.
    Duplicate Email Go to MiLogin and update your user profile. The same email cannot be used for multiple accounts.
    Login Failed Click "Go Home" to attempt to log in again.
    Missing Email Go to MiLogin and update your user profile with an email address.
    Connection Timeout Try your action again in a few minutes.


  • Error Codes

    Error Codes

    The 3-digit number in the Error Code will allow you to do a little troubleshooting on your own. Below is a table of details on how to handle each code.

    Sub Code Possible Resolution
    000 Something went wrong, refresh your browser, and attempt the action again.
    001 There has been no activity on the page for 15 minutes. Refresh your browser and attempt the action again. 
    002 The information provided does not match anything on record. Check your entries for completeness and accuracy and try again.
    003 A connectivity issue has occurred. Please try again, and if the problem persists, contact Treasury.