Identify the main organizational models used in the design of tax administrations and explain the advantages and disadvantages of the different models. Compare the roles of Headquarters and Field Operations in a tax administration’s organizational structure., This guide is part of a series of Virtual Training to Advance Revenue Administration (VITARA) reference guides that has been developed based on the contents of the VITARA online modules., VITARA stands for Virtual Training to Advance Revenue Administration and is a joint initiative of four organisations, Inter-American Center of Tax Administrations (CIAT), Intra-European Organisation of Tax Administrations (IOTA), International Monetary Fund (IMF), and Organisation for Economic Co-operation and Development (OECD)., VITARA is an exciting new initiative from the IMF and its partnering international organizations (the Inter-American Center of Tax Administrations, CIAT), the Intra-European Organisation of Tax Administrations, IOTA), and the Organisation for Economic Co-operation and Development, OECD)., VITARA - Taxpayer Services (VITARA-TPS) This short course addresses capabilities of a modernized taxpayer service program, outlines strategies to assist tax administrations in developing and implementing effective taxpayer service programs and provides performance indicators to ensure taxpayer service programs are delivering the results intended., VITARA Reform Management Fundamentals: Setting Up A Reform Program explains key concepts of reform management, the process of developing a reform program, the key management and governance arrangements of tax administration reforms as well as tax administration reform project management..