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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.

Provides data on foreign income and taxes reported by U.S. corporations claiming foreign tax credits. These credits are claimed to reduce or eliminate the double taxation of income earned overseas. Data are taken from Form 1118.

International tax statistics - Individual foreign earned income/foreign tax credits

Metadata pilot page - Data source and limitations

This section contains statistical tables, articles, microdata, and other information on charities and other tax-exempt organizations, those exempt from income tax under Sections 501(c)(3) and 501(c)(4)-(9) of the Internal Revenue Code.

The gross tax gap is the difference between true tax liability for a given tax year and the amount that is paid on time. It is comprised of the nonfiling gap, the underreporting gap, and the underpayment (or remittance) gap. The net tax gap is the portion of the gross tax gap that will never be recovered through enforcement or other late payments.

The Statistics of Income (SOI) Bulletin is issued quarterly by the Statistics of Income Division of the Internal Revenue Service. The report provides the earliest published annual financial statistics obtained from the various types of tax and information returns filed, as well as information from periodic or special analytical studies of particular interest to students of the U.S. tax system, tax policymakers, and tax administrators. Selected historical and other data tables, previously published in the spring issue of the Bulletin are now only available on SOI¡¯s pages of the IRS Website.

Statistical tables classified by tax rate and income percentile.

Brief descriptions of recent major additions to tax stats are shown here.

Find balance sheet and income statistics for partnerships here. This area includes historical data and data presented by industry.