Form 1040-X

Form 1040-X

A form that one uses to amend a previously filed Form 1040, which is used to report one's income and pay the income tax.
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If the home is purchased between April 16, 2009, and November 30, 2009, the taxpayer can still claim the credit on a 2008 tax return by requesting an extension of time to file (Form 4868) before the April 15 deadline or by filing an amended return (Form 1040-X).