Creating a Logon - MyTax Illinois

A Letter ID is a unique set of alpha and numeric characters used to identify each letter issued by IDOR. To obtain access to an Individual Income Tax account through MyTax Illinois, you are required to enter a Letter ID from a letter that was issued within the last 90 days from your Individual Income Tax account. Common letters that can be used to activate your logon include:

• Return Correction Notice
• Notice of Tax Due
• Notice of Deficiency
• Notice before Collection
• Examiner’s Report
• Notice of Proposed Tax Due
• Certain IDOR Collections notices

If you do not have a letter that meets these criteria, you can request a Letter ID be mailed to you by selecting “Request a Letter ID” on the "Individuals" panel.

For joint filers, the Letter ID will only activate a logon for the taxpayer listed first on the letter (i.e., the primary spouse). Individual Income Tax filers who file their returns jointly and who would like to file returns or respond to notices should activate a MyTax Illinois logon under the person listed as the primary taxpayer. The letter must be issued within the last 90 days. If your letter is greater than 90 days old or is otherwise invalid, you can request a new letter ID under the "Individuals" panel. Note that some categories of letters, for example, a letter that contains “Identity Verification” in the letter title, cannot be used to activate a logon.

If you have any questions about activating a MyTax Illinois logon using a Letter ID, contact us at Rev.MyTaxHelp@illinois.gov or call the Taxpayer Assistance Division (TAD) at 800-732-8866.

If you do not have a recent notice issued to you by IDOR from which you can obtain a Letter ID, then you can select the link “Request a Letter ID” under the "Individuals" panel. You must have previously filed a tax return with IDOR in order to activate a logon. We will send a letter to the mailing address we have on file for you.

No. You do not have to activate a MyTax Illinois logon to file your current year Form IL-1040. For more information, see File Form IL-1040, Individual Income Tax Return, on MyTax Illinois.

If you have a MyTax Illinois logon, you can logon and choose the “File a Return” option.

If this is your first year filing in Illinois, your driver’s license or state ID information must be entered exactly as it appears on your card issued by the Illinois Secretary of State. Your 12-character license or state ID number starts or ends, respectively, with the first letter of your last name. Make sure you do not enter any punctuation after your middle initial, and do not enter an invalid suffix (valid suffixes are Sr, Jr, II, etc. and are not Mr., Ms., your gender, or your pronouns).

Examples of common entry errors:

• Entering just your driver's license or state ID number, rather than entering every field. If this is your first year filing in Illinois, every field must be entered. If the software does not prompt you to enter every field, you may have to go back through the software and answer the question "Is this your first year filing in Illinois?" differently.
• Using a Middle Name when only a Middle Initial is shown
• Using a Middle Initial when a full Middle Name was shown
• Using a different weight from what is shown
• Using a Suffix when none is shown
• Not using a Suffix when one is shown
• Typos
• ID is too new and is not yet in IDOR’s system

If your Prior Year AGI doesn't match the Prior Year AGI on the IDOR production file, there may be:

1. No prior year return on file with IDOR. This may be because:

• The prior year return was rejected.
• The prior year return was filed under an incorrect SSN/ITIN.
• The prior year return was received but was unable to be processed.
• The prior year return had a notice issued regarding verification of identity, and no response to that notice was received by IDOR.

2. A change or correction was made to the return by the taxpayer or IDOR after the original filing.

3. A typo in the number provided, or the incorrect line was entered from your prior year return.

• This figure can be found on your prior year IL-1040 Line 1 or your federal Form 1040 or Form 1040SR Line 11.

Once your business is registered with IDOR, or IDES, you can activate your MyTax Illinois logon. Allow 24 hours from your registration confirmation email before activating a logon for MyTax Illinois.

To activate a logon for business, select the taxpayer ID type. You can use one of the following options to validate the activation:

• Owner/Officer or Responsible Party Social Security Number
• PIN previously issued by IDOR (used for certain electronic filing methods, such as Webfile and third-party tax software, separate from MyTax Illinois)
• Account Activity validation

This activation process is to help ensure only individuals who are authorized by their organization gain access to a business’s tax information.

Once you have activated your MyTax Illinois logon, if you are a Corporation, S-Corp, Partnership, or LLC organization type and are registered for other tax accounts, you can register for additional new tax types through your existing MyTax Illinois logon account, by selecting “More…” and then selecting “Register for New Tax Accounts.” Sole proprietorships can only register for new tax accounts by selecting “Register a New Business (Form REG-1)” and completing Form REG-1, Illinois Business Registration Application, on the MyTax Illinois homepage.

If you have not previously completed Form REG-1-O to provide owner/officer information or if that information has since changed, you may not be able to activate your logon without first providing updated information to IDOR. If your business has previously activated a MyTax Illinois logon under another user, this can also prevent you from activating a logon. For assistance, email rev.mytaxhelp@illinois.gov.

The security code is a security enhancement to help protect your logon. When you first set up two-step verification, you can choose a primary and backup method to receive this code by email to an address you provide, by using an authenticator app, or via text message. A new code will be provided to you by the method you select each time you log in to MyTax Illinois. You do not need a new code every time you logon to MyTax Illinois if you save a trusted browser. You can remove trusted browsers via Two-Step Security.

This two-step verification ensures that only one user will have access to a username and password. If you have multiple users in your organization who need to logon to MyTax Illinois, see Additional Logons. If you are a tax professional who uses MyTax Illinois to access your client accounts, see Third-Party Access.

If you would like to set up a secondary method, such as a second email address, to verify your MyTax logon, you can do so under “Manage My Profile.”

• If you requested your code by email, check your Spam and Junk folders. You may also need to check with your IT department to ensure you are able to receive emails from Rev.DoNotReply@illinois.gov.
• If you can no longer use the method you have set up for receiving your security code, email Rev.MyTaxHelp@illinois.gov or call using the contact information below.
  • Businesses accounts, call CRD at 217-785-3707.
  • For an Individual Income Tax account, call Taxpayer Assistance at 800-732-8866 and select the tax type from the menu.