A mild snowstorm. A winter storm is an event in which varieties of precipitation are formed that only occur at low temperatures, such as snow or sleet, or a rainstorm where ground temperatures are low enough to allow ice to form (i.e. freezing rain).
Federal amendments are generally due within three years from the date the return is originally due. The tax year and due date are a little confusing to understand, so the easiest way to think of due dates is to add one year to the tax year you want to amend.
Beware: IRS Now Has Six Years To Audit Your Taxes, Up From Three. No one wants to be audited, so knowing how long your tax return can be attacked is important. The statute of limitations on taxes is a fundamental rule allowing taxpayers to eventually cut off their exposure.