Follow the steps to fill out the IL RUT-25 Instructions effectively.

1. Click ‘Get Form’ button to obtain the IL RUT-25 form and open it in the editor. Ensure you have all required information ready to complete the form.
2. Start by entering the purchaser’s information as it appears on the title or registration application on lines 1 through 9. Provide the exact name and address without using a post office box, indicate the municipality, county, and telephone number.
3. Enter the seller’s information for lines 1 through 4, ensuring the name, address, and Federal Employer Identification Number (if applicable) are accurately filled.
4. In this section, describe the item purchased by entering the identification number, purchase date, and date the item was brought into Illinois on lines 4, 5, and 6.
5. If exempt from tax, mark the appropriate box in line a through g. If your transaction is taxable, skip to Step 6.
6. Calculate the tax due as instructed on lines 1 through 7, ensuring to attach any necessary documents like bills of sale and proof of tax paid.
7. Finally, sign the form where indicated. If applicable, include a co-owner's signature, attach payment made out to the Illinois Department of Revenue, and submit the form along with the vehicle’s title or registration application to the proper agency.

Complete your IL RUT-25 form online to ensure timely filing and registration.