The September 15 tax deadline is looming! If you need to file a Form 1065 (partnership return), Form 1120S (S corporation return) or Form 1041 (fiduciary return) the deadline to file your 2009 return is September 15, 2010. This assumes you had filed for an extension prior to April 15, 2010.

If you haven’t filed your tax return by now, you should probably consider filing for an extension. It is a lot easier to file for an extension than it is to amend a return later for a mistake you made trying to rush your return to completion. Even more costly are underpayment penalties and interest if the IRS finds a mistake.