The Illinois Department of Revenue (IDOR) is reminding taxpayers that the upcoming deadline is quickly approaching for filing 2023 state individual income tax returns on Monday, April 15th, 2024. If a taxpayer electronically files an error-free return, they should receive a direct deposit refund in approximately four weeks. Taxpayers are encouraged to also help prevent fraud by protecting their personal information and staying alert to phone scams or phishing emails. If a return cannot be filed by the April 15 due date, taxpayers may make an extension payment electronically through MyTax Illinois. To pay by mail, they may use Form IL-505-I, Automatic Extension Payment for Individuals Filing Form IL-1040, to calculate and make payments. While an extension provides additional time to submit any relevant paperwork, taxpayers need to pay the taxes owed by the April 15 deadline to avoid penalties and interest. IDOR’s taxpayer assistance numbers are available for tax-related inquiries without having to wait for an agent. To receive assistance taxpayers may call 1-800-732-8866 or 217-782-3336. Free language assistance for Limited English Proficiency (LEP) individuals is available. For the most up-to-date information, forms, schedules, and instructions for the 2024 tax season, please visit IDOR’s website at tax.illinois.gov.