In 2010, the IRS processed 137 million individual income tax returns and issued 107 million refunds totaling $312 billion. The compliance checks it performs before refunds are issued thus could affect millions of taxpayers and billions of dollars of refunds by identifying taxpayers who overclaim or underclaim tax benefits to which they are entitled. Math error authority is just one example of the pre-refund compliance checks that IRS uses. During 2010, IRS sent taxpayers 8.4 million notices for 10.6 million math errors identified on their 2009 individual tax returns. This statement focuses on 3 key areas: (1) pre-refund checks and their benefits; (2) how those checks can be enhanced immediately, and in the future. This is a print on demand report.