These are from the IRS.gov web site.
W-2 FORMS:
http://www.irs.gov/taxtopics/tc154.htmlDeadline to file:
Topic 301 - When, Where, and How to File
April 15 each year is the due date for filing your Federal individual income tax return, if your tax year ends December 31st. Your return is considered filed timely if the envelope is properly addressed and postmarked no later than April 15. If you use a fiscal year (which is a year ending on the last day of any month other than December), your return is due on or before the 15th day of the fourth month after the close of your fiscal year.
If you cannot file by the due date of your return, then you can request an extension of time to file. However, an extension of time to file is not an extension of time to pay. You will owe interest on any past