Tax returns in the United States are reports filed with the Internal Revenue Service (IRS) or with the state or local tax collection agency (California Franchise Tax Board, for example) containing information used to calculate income tax or other taxes. Tax returns are generally prepared using forms prescribed by the IRS or other applicable taxing authority.

Due Date for Federal Income Tax Returns (and Tax Extension requests) - Tax Day for Tax Year 2010 - Filing Deadline. The traditional tax return filing deadline is April 15 of each year, but the IRS has approved April 18, 2011 as the tax filing deadline for 2010 Tax Returns and extension requests in observation of Emancipation Day in the District of Columbia.