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2011 Fall Bulletin

SOI Tax Stats - IRS Data Book - Service to Taxpayers section page.

Explanation of the terms and concepts used in the annual Statistics of Income (SOI) studies of tax-exempt bonds.

The Statistics of Income (SOI) program produces data files compiled from samples of tax and information returns filed with the IRS. There's a wealth of information about the financial composition of individuals, business taxpayers, tax exempt organizations and more. Look here for some summary statistics from these files, as well as files from other IRS sources.

Look here for the prior year IRS Data Books (Publication 55B). The tables shown in these publications contain statistics for IRS collections and refunds, as well as number of returns. There's also information on examination activities, taxpayer assistance, chief counsel, appeals, criminal investigation, and more.

SOI Fall Bulletin 2012

SOI Tax Stats - SOI Bulletin: Spring 2015

SOI Tax Stats - Split-Interest Trust Study Terms and Concepts

SOI Tax Stats - SOI Bulletin: Winter 2016

Statistical tables and articles presenting data from Form 990-T, Exempt Organization Business Income Tax Return, filed by exempt organizations generating income from activities considered "not substantially related" to their tax-exempt mission.