Pursuit's Take
The IRS uses its National Research Program to study tax compliance issues. The program recently completed a study on employment tax returns filed between 2008 and 2010, but the IRS has not made plans to analyze the results of this study.
GAO looked at the study results and found that noncompliance in reporting taxable wages most frequently involved how workers were classified (and whether employers had to withhold and pay employment taxes for them), and fringe benefits (such as moving expenses).
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