Most of us manage to get through every tax season relatively unscathed, but others are not so lucky. Nothing strikes fear and panic in a taxpayer\'s heart like the prospect of a tax audit. What would you do if the IRS picked your tax return for an audit? Here we look at what you can do to prepare for an audit and what kind of penalties you can expect if you\'ve underpaid on your taxes. We also answer the question every taxpayer ponders at least once in his or her lifetime: wh