IL-W-6-WS

Form IL-W-6-WS is an official worksheet issued by the Illinois Department of Revenue, specifically designed for non-resident employees who have worked in Illinois during the 2025 calendar year. This form acts as a detailed supplement to Form IL-W-6, which certifies the days a non-resident has worked within the state. The primary purpose of Form IL-W-6-WS is to provide a comprehensive record of each day worked in Illinois, along with the exact addresses of work locations, between January 1, 2025, and January 1, 2026. By requiring this information, Illinois ensures accurate state income tax withholding and compliance for non-resident workers. Employees must submit this worksheet to their employer by January 1, 2026, and employers are required to retain it with their payroll records, making it available to the Department of Revenue upon request. This process helps both employees and employers maintain proper documentation for tax purposes and protects against potential penalties for non-compliance.

How To File Form IL-W-6-WS

Filing Form IL-W-6-WS involves several clear steps:

1. Employee Completion:
   Non-resident employees who have completed Form IL-W-6 must also fill out Form IL-W-6-WS, listing every day worked in Illinois and the corresponding work addresses.
2. Submission Deadline:
   The completed worksheet must be submitted to your employer no later than January 1, 2026.
3. Employer Responsibilities:
   Employers must enter their business name and Federal Employer Identification Number (FEIN), keep the worksheet with payroll records, and provide it to the Illinois Department of Revenue if requested.
4. Record Keeping:
   Employees should keep a copy of the completed worksheet for their own records. If more space is needed, attach additional sheets in the same format, but do not repeat the total on these extra pages.

How To Complete Form IL-W-6-WS

Below are clear, line-by-line instructions for every field and section of Form IL-W-6-WS, ensuring you do not miss a single detail.

Header Information

Field	Instructions
Business Name	Enter your employer’s full legal business name as it appears on official documents.
FEIN	Write your employer’s Federal Employer Identification Number (nine digits, no dashes).
Employee Name	Fill in your complete legal name, matching your Social Security records.
SSN	Enter your nine-digit Social Security Number clearly and accurately.

Daily Work Record Table

For each day you worked in Illinois, you must provide the following details. The form provides 62 lines for daily entries; if you need more, attach additional sheets in the same format.

Line	What To Enter
3-33	On each line, write the date you worked in Illinois (MM/DD/YYYY) and the full address (street and city) of the work location. List each day separately and in chronological order.
34-49	Continue listing additional dates and addresses if you worked more than 31 days in Illinois.
50-64	Use these lines if you have even more days to report. Each line should have one date and the corresponding address.

Tips:

• For each date, include the complete street address and city where you worked.
• If you worked at multiple locations on the same day, list the primary location or the one where you spent the most time.
• Do not skip any days you worked in Illinois.

Total Days Worked

Field	Instructions
Total Days Worked	After listing all your Illinois workdays, count the total number of days entered and write this number in the “Total Days Worked” field. This should match the number of date entries you provided.

Certification And Signature

Field	Instructions
Employee’s Signature	Sign your name to certify that all information provided is accurate and complete.
Date	Enter the date you are signing the worksheet (MM/DD/YYYY).

Additional Sheet Guidelines

• If you need more space, attach extra sheets using the same format as the original worksheet.
• Do not enter the total days worked on any additional sheets—only on the main worksheet.
• Number your additional sheets and include your name and SSN at the top of each page for identification.

Key Takeaways

Key Finding:
Completing Form IL-W-6-WS accurately is essential for non-resident employees to comply with Illinois tax laws and for employers to maintain proper payroll records. Every line must be filled out clearly, with precise dates and addresses, and the form must be signed and submitted by the deadline.

Summary Table: Form IL-W-6-WS Completion Steps

Step	Action
1. Fill Header	Enter business and employee information (name, FEIN, SSN).
2. List Workdays	Record each Illinois workday and address, one per line.
3. Calculate Total	Count and enter the total number of days worked in Illinois.
4. Sign and Date	Certify the worksheet with your signature and the date.
5. Submit to Employer	Give the completed worksheet to your employer by January 1, 2026.
6. Attach Extra Sheets	If needed, add more pages in the same format, without repeating the total.