State Information Data Exchange System (SIDES)

SIDES is a free electronic system that uses a nationally standardized format to allow employers to easily respond to UI Notice of Claims ​information requests, attach documentation when needed, and receive a date-stamped confirmation of receipt.​​

Registering for SIDES is easy if you already have a MyTax Illinois account.

• ​Simply login to your MyTax Illinois account at mytaxillinois.gov.
  • Click on the “View All Account Information” tab located in the Unemployment Insurance Grid
  • Locate the "SIDES" Grid
  • Select "Manage SIDES Information"
  • Select "Manage" or "Enroll" next to "Income Verification"
  • Select "Manage" or "Enroll" next to "Separation Information"
• It's that easy!
  

For assistance please call 800-247-4984.

• ​For claims information, press 4
• Then, for SIDES information, press 1

• SIDES MyTax Illinois Access Instructions
• SIDES User Guide
• SIDES Overview​

Why should I consider SIDES?

The SIDES website provides an easy, efficient and secure way to electronically respond to UI Notice of Claims information requests from IDES.​

• Eliminates delays related to paper mail delivery;
• Allows more time to gather information and respond
• Ensures more complete information is provided through standard validations and business rules;
• Reduces time-consuming follow-up telephone calls;
• Keeps UI tax rates lower by reducing improper payments.​

SIDES also addresses two of the largest causes of UI overpayments;

• Incorrect initial eligibility decisions (job separation issues) and
• Working while receiving UI benefits

Additional information is available at the Unemployment Insurance State Information Data Exchange (SIDES).​