Illinois MFUT-15 IFTA Quarterly Return Instructions

Submit your completed MFUT-15 form electronically using MyTax Illinois at mytax.illinois.gov. For assistance, email REV.IFTA@illinois.gov or call 217-785-1397. Ensure all fields are accurately filled and submitted before the deadlines. If mailing is required, send forms to Illinois Department of Revenue, IFTA Processing, Springfield, IL. Be sure to retain copies of your submission for your records. Advice: Adhere strictly to deadlines and double-check all entries to ensure accuracy.

For 2024: Q1 - April 30, Q2 - July 31, Q3 - October 31, Q4 - January 31, 2025. For 2025: Q1 - April 30, Q2 - July 31, Q3 - October 31, Q4 - January 31, 2026. Ensure timely submission to avoid penalties.

The purpose of the Illinois MFUT-15 IFTA Quarterly Return is to allow Illinois-based motor carriers to report their fuel usage and mileage under the International Fuel Tax Agreement (IFTA). This form is essential for ensuring compliance with IFTA, which enables the equitable distribution of fuel tax revenues across jurisdictions. Accurate reporting helps carriers manage their tax obligations efficiently and claim appropriate refunds. Each quarter, carriers must submit the form detailing the operations of all qualified vehicles within their fleet. This includes mileage and fuel usage both within and outside IFTA jurisdictions. By following the instructions provided, carriers can ensure they report all necessary information accurately, which aids in avoiding penalties and interest for late or incorrect filings. Moreover, the form also facilitates the cancellation of IFTA credentials when a carrier ceases operations. This provision ensures that businesses can conclude their tax obligations promptly and without complications. Keeping thorough records and adhering to the quarterly deadlines are critical components of fulfilling the requirements of the MFUT-15 IFTA Quarterly Return.

• 1. Filing Status: Indicate whether the return is for quarterly filing, an amended return, no operation, or fuel license cancellation.
• 2. Total Miles: Enter the total miles traveled everywhere (both IFTA and non-IFTA jurisdictions) for each fuel type.
• 3. Total Gallons: Enter the total gallons of fuel used (both IFTA and non-IFTA jurisdictions) for each fuel type.
• 4. Average MPG: This field is systemically calculated by dividing total miles by total gallons for each fuel type.
• 5. Jurisdiction: Enter the abbreviation for each IFTA jurisdiction traveled.
• 6. Fuel Type: Select the fuel type consumed in each IFTA jurisdiction from the drop-down menu.
• 7. Taxable Miles: Enter the taxable miles for each jurisdiction.
• 8. Taxable Gallons: This field is calculated by dividing taxable miles by the average miles per gallon (MPG).
• 9. Tax-paid Gallons: Enter the tax-paid gallons purchased in the specified jurisdiction during the reporting period.
• 10. Net Taxable Gallons: This field is calculated by subtracting tax-paid gallons from taxable gallons.
• 11. Tax Rate: This field is populated with the appropriate fuel tax rate for each IFTA jurisdiction.
• 12. Surcharge Rate: For jurisdictions that impose a surcharge, this field is populated with the appropriate rate.
• 13. Tax or Credit Due: This field is calculated by multiplying net taxable gallons by the tax rate, displaying credits as negative amounts.
• 14. Interest Due: If the return is filed late, this field calculates the interest owed to each IFTA jurisdiction where tax is due.

Failing to submit the Illinois MFUT-15 IFTA Quarterly Return can result in several penalties and consequences. It is crucial to adhere to deadlines to avoid these issues.

• Late Filing Penalties: Penalties may be imposed for late submissions, increasing the amount owed.
• Accrued Interest: Interest is calculated monthly on any unpaid tax, adding to the overall cost.
• Audit Risk: Failure to file may trigger an audit, requiring the submission of detailed records and potentially resulting in further fines.

• 1. Quarterly Reporting: Submit the form every quarter to report fuel usage and mileage.
• 2. Tax Refund Claims: Use the form to claim refunds for non-highway use gallons.
• 3. IFTA Credential Cancellation: File the form to cancel IFTA credentials when ceasing operations.
• 4. Accurate Record Maintenance: Ensure compliance with IFTA regulations by maintaining and reporting accurate records.
• 5. Tax Computation: Use the form to compute taxes due or credits claimed based on reported data.