The GTED Companion Paper provides an overview of the Global Tax Expenditures Database (GTED), a comprehensive source of tax expenditure data from around the world. The GTED includes information on tax incentives, subsidies, and other tax measures implemented by governments to achieve specific policy objectives. The paper describes the search process, data collection and classification, and quality assurance measures used to ensure the accuracy and reliability of the data. The GTED website provides a practical guide for users, including a home page, country profiles, data visualisation, and data download options. The paper concludes by highlighting the importance of using the GTED for comparative analysis and policy development.