Form 4868, Application for Automatic Extension of Time to File U.S. Individual
Income Tax Return

Form 7004, Application for Automatic Extension of Time To File Certain
Business Income Tax, Information, and Other Returns

Form 4768, Application for Extension of Time To File a Return and/or Pay U.S.
Estate (and Generation-Skipping Transfer) Taxes
Jane E. Ritzinger, CPA, CFE
Links to federal extension forms:
Extensions
You can automatically extend the due
date of your income or estate tax return.
 The extension of the time to file the
return does not extend the due date of
any taxes due.
California
California gives taxpayers an automatic filing
extension through October 15, 2010. You
don't need to apply for one.  However, any
taxes due must be paid by April 15, 2010.
Links to California payment vouchers (under automatic
extension):
Form FTB 3519 Payment for Automatic Extension for Individuals

FTB 3539 Payment for Automatic Extension for Corporations and Exempt
Organizations