Both the federal government and the State of Illinois issue ID numbers.
A business must obtain an Employer Identification Number (EIN) if it is a:
- Sole proprietorship with employees from whom taxes are withheld
This is done by filing IRS Form SS-4 or by calling the IRS at (800) 829-4933. If you call, it is best to have a blank copy of Form SS-4 on the table in front of you. The form can be downloaded from the IRS website.
The company must also obtain an Illinois Business Tax number from the Illinois Department of Revenue. When you register the business, ask if the company is eligible for a resale number that allows it to purchase goods and services for resale without paying “sales and use” taxes.