The Department of Treasury’s Office of Tax Policy is seeking information from vendors capable of providing a web-based subscription to a comprehensive tax research tool. The tool must offer access to federal, state, and local taxation reports, expert tax treaties, and an International Tax Library, with features like advanced search, editorial enhancements, alerts, and mobile access. No budget amount or performance location is specified in this notice. Responses are due by July 3, 2026, and this is a sources sought for planning purposes only, not a solicitation. The Treasury has not yet determined its acquisition approach for this requirement.