Federal tax forms includes all of the Internal Revenue Service forms that individuals, partnerships, and corporations use to provide information to the Internal Revenue Service on their income, expenses, and, of the most interest to the Internal Revenue Service, how big the taxpayer's tax liability is. Federal tax forms may be updated annually, as is the case for annual tax returns. These federal tax forms are updated not only with the year, but also to reflect legislation, such as new or expired tax credits, income limitations or additional information which is being required by the Internal Revenue Service. For example, in 2008, the Form 990, which is a federal tax form required to be filed annually by organizations exempt from paying tax under Internal Revenue Code Section 501(c), was t