Form ITR-1 at a glance
What it is: Form ITR-1 is the Illinois Department of Revenue's Request for Tax Clearance.
Who signs: An owner or officer of the business requesting the tax clearance must complete this step. Signature stamps are not acceptable. If you have been appointed as power of attorney for the taxpayer requesting this tax clearance, you must attach a copy of your power of attorney that specifically states your authorization in tax related situations. See Form IL-2848, Power of Attorney.
A filled-in Form ITR-1 example: a bakery asks for clearance for a license renewal

How to fill out Form ITR-1, box by box
Step 1: Identify yourself or your business

In Step 1, Identify yourself or your business, write your Name.
Write your Doing business as (DBA), Street address and City, state, ZIP. Mark yes or no for each of these: Do you make retail sales in Illinois? Do you maintain an office in Illinois? Do you have employees in Illinois?
Write your Telephone (include area code), Federal Employer Identification number (FEIN), Illinois Account ID, Social Security number, Excise Tax License number and the Date business started in Illinois as Month Day Year. If this tax clearance is to be sent to a third party, provide the following: Name, In-care-of name, Address (Number and street or post office box), City, state, ZIP and E-mail Address.
By completing the email address fields, you are authorizing the Illinois Department of Revenue to send confidential information through internet email. Internet email replies from the Illinois Department of Revenue are not binding on the Department and create no rights under the Taxpayer Bill of Rights. The Illinois Department of Revenue assumes no liability for lost, eavesdropped, or otherwise misused information provided in the email.
Step 2: Check the taxes for which you are requesting tax clearance
Step 3: Check the reason you are requesting tax clearance
More rules for Form ITR-1
This tax clearance does not preclude assessment for any liability for pending, current, or future taxes or liabilities that may be established by present or future audits conducted by the department.
Before you go
Form ITR-1 will not be processed until all returns are filed and balances paid (including penalty and interest, if applicable). Allow at least 10 business days for processing of Form ITR-1. If you are selling or have sold your business assets, do not complete Form ITR-1, Request for Tax Clearance. You must complete Form CBS-1, Notice of Sale or Purchase of Business Assets. If you need assistance in completing Form ITR-1, you can contact the Illinois Department of Revenue at 1 800 732-8866.
Common questions about Form ITR-1
Where do I file it?
Mail to: PROBLEMS RESOLUTION DIVISION, ILLINOIS DEPARTMENT OF REVENUE, PO BOX 19014, SPRINGFIELD, IL 62704-9014, or email to rev.prd@Illinois.gov.
Sources
[1] Form ITR-1, Request for Tax Clearance, Illinois Department of Revenue (the Official source link on this page).



