The linked files are available as Microsoft Excel® files. A free Excel Viewer is available for download, if needed. Taxpayer Advocate Service: Postfiling Taxpayer Assistance program by type of primary issue and relief NOTE: In prior editions of the IRS Data Book, Table 11 was presented as Table 20. 2023 XLSX 2022 XLSX 2021 XLSX 2020 XLSX 2019 XLSX 2018 XLS 2017 XLS 2016 XLS 2015 XLS 2014 XLS 2013 XLS 2012 XLS 2011 XLS 2010 XLS 2009 XLS 2008 XLS 2007 XLS 2006 XLS 2005 XLS 2004 XLS 2003 XLS 2002 XLS 2001 XLS 2000 XLS Return to the IRS Data Book home page
