Illinois Department of Revenue - find state tax forms, file your state tax return online, and find state tax information.
Illinois Sales Tax Rate Finder - tool for finding the sales tax rates of Illinois municipalities.
Lake County Property Tax Assessment Information - find your property tax bill, property tax appeal information, and assessment information.
Lake County Tax Assessment Maps Online - use this interactive tool to find district boundaries or to look up your property.
Internal Revenue Service - find federal tax forms and federal tax information.
Internal Revenue Service - filing options - find federal tax filing options; includes a link to e-file for free for qualified taxpayers.
Internal Revenue Service - Get Ready - Information from the IRS to help you get ready today to file next year's federal income tax return.
Internal Revenue Service - Tax Withholding Estimator - The Estimator helps you identify your tax withholding to make sure you have the right amount of tax withheld from your paycheck at work.
My Free Taxes - Sponsored by United Way, free online tax software for individuals and families who earned less than $66,000 in 2018.