This paper presents and describes data for nonprofit IRS filings in the United States of America. The data contains 831 attributes and 1,102,884 records for the years 2016-2021. Among other items, the data include nonprofits’ comparative financial data, governance disclosures, and hired contractors, as well as management compensation, a detailed statement of revenue, statement of functional expenses, external audit, federal audit election, and reconciliation of net assets. The data is generated using Structured Query Language (SQL) self-developed code to convert the IRS form 990 Extensible Markup Language (XML) tax filing files to a dataset in Excel. This paper is the first to convert these XML files and provide much-needed open access to nonprofit data in a long format that is useful for researchers to conduct cross-sectional analysis. The 2,174 lines of source code that we developed, and a step-by-step guide are included in this paper.