Illinois Department of Revenue (IDOR)

Apr 9, 2026

Access the Illinois Department of Revenue (IDOR) here.

The Illinois Department of Revenue (IDOR) is the state agency responsible for collecting and administering taxes in Illinois. They ensure compliance with state tax laws and regulations to support government programs and services for residents of Illinois.

Agency Accounts

Illinois Business Income Tax Account

Access your online account via MyTax Illinois.

The Illinois Business Income Tax Account allows you to set up and manage the following information:

Taxpayer ID (Business Income Tax)

Illinois Sales Tax Account

Access your online account via MyTax Illinois.

The Illinois Sales Tax Account allows you to set up and manage the following information:

Sales Tax Account ID

Illinois Sales Tax-Exempt Account

Access your online account via MyTax Illinois.

The Illinois Sales Tax-Exempt Account allows you to set up and manage the following information:

Sales Tax-Exempt Number

Illinois Withholding Tax Account

Access your online account via MyTax Illinois.

The Illinois Withholding Tax Account allows you to set up and manage the following information:

Taxpayer ID (Withholding Tax)

Illinois Purchase Sales Tax Exemption Account

The Illinois Purchase Sales Tax Exemption Account allows you to set up and manage the following information:

Purchase Exemption Registration Date : Date that your purchase exemption registration was filed in Illinois.

Find out more on how to stay compliant with the Illinois Department of Revenue (IDOR):

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Agencies in Illinois

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