SOI Tax Stats - Examination coverage: Recommended and average recommended additional tax after examination - IRS Data Book Table 17b – Discontinued

IRS Tax Stats - Examination Coverage: Recommended and Average Recommended Additional Tax After Examination, by type and size of return, fiscal year - IRS Data Book Table 17b
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IRS - Enforcing laws

This area contains statistics on the number of returns examined by IRS and the recommended additional tax after examination, by type and size of the returns. Additional data are also available here.
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Tax Professionals

SOI Tax Stats - Corporation Source Book statistical tables 2003 (all sectors)

SOI Tax Stats - Corporation Source Book Statistical Tables 2003 (All Sectors)
About IRS
Tax Professionals