IRS tax forms are used for taxpayers and tax-exempt organizations to report financial information to the Internal Revenue Service

Internal Revenue Service

The Internal Revenue Service is the revenue service of the United States federal government. The agency is a bureau of the Department of the Treasury, and is under the immediate direction of the Commissioner of Internal Revenue...

 (IRS) of the United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

. They are used to report income

Income

Income is the consumption and savings opportunity gained by an entity within a specified time frame, which is generally expressed in monetary terms. However, for households and individuals, "income is the sum of all the wages, salaries, profits, interests payments, rents and other forms of earnings...

, calculate taxes

Taxation in the United States

The United States is a federal republic with autonomous state and local governments. Taxes are imposed in the United States at each of these levels. These include taxes on income, property, sales, imports, payroll, estates and gifts, as well as various fees.Taxes are imposed on net income of...

 to be paid to the federal government of the United States

Federal government of the United States

The federal government of the United States is the national government of the constitutional republic of fifty states that is the United States of America. The federal government comprises three distinct branches of government: a legislative, an executive and a judiciary. These branches and...

, and disclose other information as required by the Internal Revenue Code

Internal Revenue Code

The Internal Revenue Code is the domestic portion of Federal statutory tax law in the United States, published in various volumes of the United States Statutes at Large, and separately as Title 26 of the United States Code...

 (IRC). There are over 800 various forms and schedules. The best-known of these is Form 1040 used by individuals.
The Form 990, Return of Organization Exempt From Income Tax, is submitted by tax-exempt and non-profit organizations to provide the Internal Revenue Service with annual financial information.