Illinois - W2 State Filing Requirements

The state requires the filing of Form W-2 if wages were paid to Illinois employees or if income tax was withheld during the year.

Illinois State ID Format:
 

• 2 digits hyphen followed by 7 digits (Eg: 99-9999999) 

• 2 digits hyphen followed by 7 digits space 3 digits (Eg: 99-9999999 999)

Filing Criteria and Requirements

Criteria 1: Even if there is no Illinois state tax withheld

• Filing Method: Direct State Filing

  • You must file a W-2 directly with the state.

• Additional Form Required: Not required

• Deadline: January 31, 2025

For more information about Illinois’s W2 filing requirements, click here.