The Internal Revenue Service has extended relief to California wildfire victims by extending tax return filing and payment deadlines.Taxpayers in the Presidential Disaster Area – consisting of Los Angeles, Orange, Riverside, San Bernardino, San Diego, Santa Barbara, and Ventura counties – will have until Jan. 31, 2008, to file returns, pay taxes, and perform other time-sensitive acts that have a deadline that falls between October 21, 2007 and January 31, 2008. This includes the federal withholding tax return, Form 941, normally due Oct.