how long do you have to keep federal tax returns
The statute of limitations for federal tax returns is usually three years from the date the return was due or filed, or two years from the date the tax was paid, whichever is later. The statute of limitations is usually longer for state tax returns. The federal three year rule has some EXCEPTIONS: The assessment period is extended to six years instead of three years if you do not report income that you should report, and it is more than 25% of the gross income shown on your tax return.