The Internal Revenue Service is providing tax relief to individuals and businesses that were affected by Hurricane Isaac, which ravaged the Gulf Coast last week.

Following recent disaster declarations for individual assistance issued by the Federal Emergency Management Agency, the IRS said Wednesday that affected taxpayers in Louisiana and Mississippi will receive tax relief, and other locations may be added in coming days, based on additional damage assessments by FEMA.

The tax relief postpones various tax filing and payment deadlines that occurred on or after Aug. 26. As a result, affected individuals and businesses will have until Jan. 11, 2013 to file these returns and pay any taxes due. This includes corporations and businesses that previously obtained an extension until Sept. 17, 2012, to file their 2011 returns and individuals and businesses that received a similar extension until Oct. 15. It also includes the estimated tax payment for the third quarter of 2012, normally due Sept. 17.

The IRS will abate any interest, late-payment or late-filing penalty that would otherwise apply. In addition, the IRS is waiving failure-to-deposit penalties for federal employment and excise tax deposits normally due on or after Aug. 26 and before Sept. 10, if the deposits are made by Sept. 10, 2012. Details on available relief, including information on how to claim a disaster loss by amending a prior-year tax return, can be found on the disaster relief page on IRS.gov.

The tax relief is part of a coordinated federal response to the damage caused by the hurricane and is based on local damage assessments by FEMA. For information on disaster recovery, individuals should visit disasterassistance.gov.

So far, IRS filing and payment relief applies to the following localities:

•    In Louisiana: Ascension, Jefferson, Lafourche, Livingston, Orleans, Plaquemines, St. Bernard, St. Charles, St. John the Baptist and St. Tammany parishes;

•    In Mississippi: Hancock, Harrison, Jackson and Pearl counties.