The Tax-Exempt Bonds Studies The Statistics of Income (SOI) studies of tax-exempt bonds includes data on "public purpose" (Governmental) bonds and tax-exempt "private-activity" bonds. These data are obtained from the Forms 8038-G, Information Return for Tax-Exempt Governmental Obligations, and Forms 8038, Information Return for Tax-Exempt Private Activity Bonds, filed and processed by the Internal Revenue Service after the bond is issued. Tabulated data regarding issuance volumes, the types of projects financed, and state-by-state breakdowns are available. This page provides additional information about data produced in SOI's Tax-Exempt Bonds Studies. Please click on a link below to get started. • Selected Terms and Concepts • Current and Prior Revisions of Form 8038-series returns • Data Sources and Limitations Please visit the Tax-Exempt Bond Statistics page for data tables and articles. The IRS Information for the Tax Exempt Bond Community page provides additional information concerning tax-exempt bonds.