Are you an unwitting tax cheat?

With just over a month to go until the April 15th tax deadline, the IRS is ramping up efforts to get the message out to taxpayers about the importance of filing returns correctly.

The focus on accuracy has grown more intense as the estimated tax gap (the difference between what taxpayers owe and what they actually pay) has grown to $300 billion each year. And, in a bad economy, many Americans are feeling the burden of paying what they perceive to be more than their fair share of taxes -- causing some to be more prone to cutting corners. In fact, the IRS Oversight Board reported that 13% of the people it polled last year said it was acceptable to cheat, up from 9% in 2008.

While some taxpayers may think it's okay to cheat, others do so without even realizing it. Here are seven common ways that taxpayers cheat (deliberately or otherwise) on their tax returns: