Louisiana taxpayers affected by Hurricane Gustav have a reprieve on filing state income taxes.The state Department of Revenue said Monday it would extend tax filing deadlines to Jan. 5. The extended deadline matches one granted last week by the Internal Revenue Service for federal income taxes due from individuals and corporations, and estimated tax payments.The extensions are available on tax returns and payments due between Sept. 1, 2008 and Jan. 5, 2009. The revenue department will waive any penalties and abate interest that normally would apply to returns received after the deadline.The extension applies to individuals whose filing addresses or that of their tax preparer are located in areas declared a federal disaster area after last week’s storm.