The location of your tax home often depends on whether your assignment istemporary or indefinite. If you are temporarily absent from your tax home inthe United States on business you may be able to deduct your away from homeexpenses for travel meals and lodging but you would not qualify for theforeign earned income exclusion because the Antarctic Region is specificallyexcluded. However if memory serves correctly you have to provide Form 1116to substantiate eligibility for deducting away from home expenses.