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.
TaxHelp.org - A comprehensive resource for all your tax needs.
State Tax Comparisons - compare sales and income tax rates of U.S. states.
Yahoo Finance: Taxes - tax-related articles and guides, calculators, and tools.