How to Prepare an Illinois Sales Tax Return

Businesses can file and pay Illinois sales taxes by mail or online.
Businesses can file and pay Illinois sales taxes by mail or online. (Image: Illinois outline image by Kim Jones from

Many businesses in Illinois are required to pay sales taxes and file a Sales and Use Tax return annually. A preprinted ST-1 form is mailed to businesses that are required to file each year. The Illinois Department of Revenue also allows sales tax return preparation and filing online, including online payment. Whether you file a paper return or file online, the instructions for preparing the ST-1 return are the same.

Things You'll Need

  • Preprinted ST-1 form
  • Account ID number
  • Personal identification number or Social Security number of an authorized officer of the business

Enter the amount of liquor or alcoholic beverage sales for your business, if applicable.

Enter the amount you received from sales of merchandise and services, including taxes and service charges.

Determine and enter the amount of tax on your receipts.

Multiply the amount on line 9 by the percentage printed on line 10 to determine your discount if you are filing before the deadline.

Determine your tax on purchases. Enter your cost of merchandise, qualifying food, drugs, and medical appliance purchases. Multiply your total by the tax rate shown, and add all categories to determine your net tax due.

Enter any credits you have, including the manufacturers purchasing credit, or MPC, and any prepayment for fuel taxes. Enter any quarterly payments you made, and any prior overpayment you made, to use it toward what you owe. Enter the amount of excess tax collection if you collected more tax than what is due, and any credit memorandums you would like to use.

Send your return, along with a check or money order, to lllinois Department of Revenue, Retailers Occupation Tax Unit, Springfield, IL 62796-0001.

Or enter your checking or savings account information for an automatic withdrawal online.

Tips & Warnings

  • When filing online, navigate back and forth using the buttons provided on the site. Using your browser's back button could cause your data to be lost.
  • If you have a question you'd like the Illinois Department of Revenue to answer, click the email button to submit your query.
  • ST-1 forms are sent to businesses annually, but they are not available for download. If you can't find your form, you must file online or call the Central Registration Division at 217-785-3707 for a replacement.

Related Searches


Promoted By Zergnet


You May Also Like

Related Searches

Check It Out

Are You Really Getting A Deal From Discount Stores?

Is DIY in your DNA? Become part of our maker community.
Submit Your Work!