A variety of Federal tax forms are available for you to pick up at your library (while supplies last). State and Federal forms and instructions are available online:

Tax Form Websites
1040.com: Online tax resource dedicated to helping you find the information, news, and forms you need to complete your taxes.
AARP Tax-Aide: Designed for taxpayers over 60, with middle and low incomes, this site offers many useful features, including free tax-preparation assistance and tax counseling.
About Taxes: Tax and accounting site directory for state and local tax forms, organizations, news, and more.
Internal Revenue Service: The Digital Daily is the entry to the official web site of the IRS. It provides access to current issues and changes, tax forms, electronic filing, job opportunities, and more.
Tax Forms From All States: Select your state on the map at the Federation of Tax Administrator's website. You'll be offered options including "current year tax forms". This link will take you to downloadable tax forms on the selected state's website.
Tax Prophet: Tax Prophet deciphers the Internal Revenue Code for U.S. and foreign taxpayers and professionals.
U.S. Tax Code Online: Private site provides complete access to the U.S. Internal Revenue Code through a variety of search strategies.