Illinois Department of Revenue (IDOR)

Mar 21, 2025

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):

Review your compliance risks, free.

More from the blog

Learn how to keep your business compliant in all 50 states across payroll, HR, Secretary of State, and tax.

San Francisco Health Care Security Ordinance (HCSO) Compliance

Many employers are already required to provide healthcare for full-time employees, but the San Francisco Health Care Security Ordinance (HCSO) takes things a few steps further. The HCSO compels greater employer involvement and a significantly larger healthcare contribution for each eligible employee. Here’s what San Francisco employers need to know about the HCSO and how Mosey can help with corporate compliance. What Is the San Francisco Health Care Security Ordinance (HCSO)?

Kaitlin Edwards | Aug 6, 2024

CT Paid Sick Leave Expansion: HR Guide to Compliance (2025)

Connecticut’s paid leave program is evolving, and starting in 2027, private employers will be subject to new requirements. This is on top of the significant expansion that began on Jan. 1, 2025, with new accrual rates, eligible employees, permissible uses, and employer obligations. This guide reviews the existing paid leave program, the upcoming changes, and what businesses need to know to manage state compliance. What Is Connecticut’s Current Paid Leave Program?

Kaitlin Edwards | Jan 2, 2025

PA Local LST and EIT Payroll Taxes: An Employer's Guide 2024

Pennsylvania employers face more compliance issues than those in other states, particularly regarding local service taxes (LST) and earned income taxes (EIT). These requirements are part of a larger system of payroll taxes that Pennsylvania employers are responsible for withholding and remitting. This guide provides a comprehensive overview of LST and EIT, outlining key aspects, updates for 2024, and best practices for managing tax compliance issues. Here’s what you need to know and how Mosey can help with business compliance.

Gabrielle Sinacola | Sep 17, 2024

Ready to get started?

Schedule a free consultation to see how Mosey transforms business compliance.