Form 1040

The standard Internal Revenue Service (IRS) form that individuals use to file their annual income tax returns. The form contains sections that require taxpayers to disclose their financial income status for the year in order to ascertain whether additional taxes are owed or whether the taxpayer is due for a tax refund. 1040 forms need to be filed with the IRS by April 15.

Also known as the "U.S. individual income tax return" or the "long form".

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