The linked files are available as Microsoft Excel® files. A free Excel Viewer is available for download, if needed. Delinquent Collection Activities by Fiscal Year NOTE: In prior editions of the IRS Data Book, Table 27 was presented as Table 25. 2023XLSX 2022XLSX 2021XLSX 2020XLSX 2019XLSX 2018XLS 2017XLS 2016XLS 2015XLS 2014XLS 2013XLS 2012XLS 2011XLS 2002–2010XLS 1994–2001XLS Return to the IRS Data Book home page