Recommended by IRS

About Publication 501, Dependents, Standard Deduction, and Filing Information

Publication 501 discusses some tax rules that affect every person who may have to file a federal income tax return.

Exempt organization types

Find types of organizations classified as tax-exempt under sections of the Internal Revenue Code.
Tax Administration (Non-Authoritative)
Charities and Nonprofits

SOI tax stats - 2016 Charities and other tax-exempt organizations microdata files

Microdata files for all 2016 Forms 990 and 990-EZ sampled for the annual SOI studies of tax-exempt organizations.
Tax Administration (Non-Authoritative)
News Media, Tax Professionals, Attorney, Charities and Nonprofits, Governments

Annual electronic notice (Form 990-N) for small organizations FAQs: Who must file

Who must file Form 990-N and what are the consequences of not filing?
Tax Administration (Non-Authoritative)
Charities and Nonprofits