Taxpayers and tax-exemp organizations are using IRS tax forms in order to report financial information to IRS annually. They use tax forms when calculate taxes and report income to the federal government of the U.S. The best known and widely used form is individual income tax form named 1040. The first Form 1040 was published for use for the tax years 1913, 1914, and 1915. For tax exempt organizations or non profit organizations, the form 990 is used when they submit financial information annually. Form 1099 is used to report various kinds of incomes other than salaries, wages and tips.