Notice of revision The 2011 IRS Data Book Table 31 XLS, Internal Revenue Service Labor Force, Compared to National Totals for Civilian and Federal Labor Forces, by Gender, Race/Ethnicity, and Disability, Fiscal Year 2011, has been revised. The number of Internal Revenue Service employees with disabilities was overstated due to a technical error in the creation of the table. (March 2013) For more information contact Statistical Information Services.