Taxpayer ID Numbers

Federal

The following entities must obtain a tax identification number from the Internal Revenue Service (IRS).

Corporations (both "C" and "S")

Partnership

Trusts

Estates

Sole Proprietorship (with employees)

Tax Exempt Organizations

Retirement Plans

Benefit Plans

This tax identification number is known as:

       Federal Employer Identification Number (FEIN)
       Employer Identification Number (EIN)
       Taxpayer Identification Number (TIN)

The federal tax ID number is a nine digit number (XX-XXXXXXX). Sometimes this ID number is referred to as a "36" number.  This is because all federal tax ID numbers in Northern Illinois begin with 36-XXXXXXX.  In Wisconsin all federal tax ID numbers begin with 35-XXXXXXX and in Southern Illinois all federal tax ID numbers begin with 37-XXXXXXX.

The federal ID number is obtained by completing Form SS-4.

The completed, signed and dated Form SS-4 can be mailed to:

IRS - Kansas City Service Center
Stop 57A - Entity Control Unit 1
P.O. Box 24551
Kansas City Missouri 64131

or

"FAX" completed, signed and dated form to:    816/926-7988

or

Call the Internal Revenue Service Tele-Tin unit at   816/926-5999 (Monday - Friday 8:00AM to 4:30PM)  The Form SS-4 must be completed prior to calling the Tele-Tin Unit.

State of Illinois

The State of Illinois also has a tax identification number.  This tax ID number is known as an Illinois Business Tax number or an IBT.  The IBT is an eight digit number (XXXX-XXXX).

The following entities must obtain an IBT from the Illinois Department of Revenue (IDOR)

Corporations (both "C" and "S")

Partnership

Sole Proprietorship (with employees)

The IBT is obtained by completing a Form NUC-1.

The completed, signed and dated Form NUC-1 is mailed to:

Illinois Department of Revenue
Central Registration Division
P.O. Box 19030
Springfield, Illinois 62794-9030

The Illinois Department of Employment Security (I.D.E.S.) also requires employers to register with I.D.E.S. and obtain a tax identification number.  This registration and tax ID number is in addition to the IBT discussed above.

The I.D.E.S. id number is obtained by filing Form UI-1.

The completed, signed and dated, Form UI-1 is mailed to:

State of Illinois
Department of Employment Security
401 South State Street
Chicago, Illinois 60605-2280

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