Important Dates

You should take the action indicated on or before the dates listed. Saturdays, Sundays, and legal holidays have been taken into account, but statewide holidays have not. A statewide legal holiday delays a due date only if the IRS office where you are required to file is located in that state.

Due dates for deposits of withheld income taxes, social security taxes, and Medicare taxes are not listed here. For these dates, see Publication 509, Tax Calendars for 2001.

Fiscal year taxpayers. Generally, the due dates listed apply, whether you use a calendar or a fiscal year. However, if you have a fiscal year, refer to Publication 509 for certain exceptions that may apply to you.

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