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Thomson Reuters ONESOURCE REST API v1.0 - Source Code

These ONESOURCE APIs use a REST architecture that provides communication via the Thomson Reuters API gateway. ONESOURCE is Thomson Reuter's corporate tax technology platform. The APIs provide access to various facets of the platform including monitoring and tracking tax-related activities and due dates, standardizing existing tax packages and workpapers with controls and validation, federal and state tax compliance, tax reporting and more.
Thomson Reuters ONESOURCE DataFlow