TIGTA’s Office of Audit (OA) identifies opportunities to improve the administration of the Nation's tax laws by conducting comprehensive, independent performance and financial audits of IRS programs, operations, and activities to:

• Assess efficiency, economy, effectiveness, and program accomplishments.
• Ensure compliance with applicable laws and regulations.
• Prevent, detect, and deter waste, fraud, and abuse.

The audit program is comprised of reviews mandated by statute or regulation, reviews requested by congressional committees' members and staff, and reviews identified through OA's planning and evaluation process. We strategically evaluate IRS programs, activities, and functions for consideration in our Annual Audit Plan, which is published every October. 

Learn more about OA's organizational structure.

TIGTA’s Office of Investigations (OI) has the unique responsibility to conduct investigations that protect the Department of the Treasury’s ability to collect revenue owed to the Federal Government. OI administers investigative programs that protect the integrity of Federal tax administration and detect and prevent fraud and other misconduct within IRS programs. This includes investigating allegations of criminal violations and administrative misconduct by IRS employees, as well as protecting the IRS against external attempts to corrupt or threaten its employees.

Learn more about OI's organizational structure and investigative mission.

TIGTA’s Office of Inspections and Evaluations identifies opportunities for improvement in IRS and TIGTA programs by performing inspections and evaluations that report timely, useful, and reliable information to decision makers and stakeholders.

TIGTA's inspection and evaluation oversight priorities are presented in the Inspections and Evaluations Program Plan, which is published every October.

Inspections are intended to:

• Provide factual and analytical information;
• Monitor compliance;
• Measure performance;
• Assess the effectiveness and efficiency of programs and operations;
• Share best practices; and
• Inquire into allegations of waste, fraud, and abuse.

Evaluations are intended to:

• Provide in-depth reviews of specific management issues, policies, or programs;
• Address Governmentwide or multi-agency issues; and
• Develop recommendations to streamline operations, enhance data quality, and minimize inefficient and ineffective procedures.

The Office of Mission Support (OMS) provides a broad range of enterprise mission support functions and infrastructure necessary for TIGTA to accomplish its mission effectively and efficiently. The office delivers mission-focused capabilities, services, and programs across six lines of business, which include finance, procurement, human capital, personnel security, facilities management, and support services. Additionally, OMS oversees all administrative services performed by TIGTA’s shared-service providers, the Bureau of the Fiscal Service/Administrative Resource Center and the Department of the Treasury, Shared Service Programs.

The Office of Chief Counsel provides legal guidance for the full range of TIGTA's activities. Legal guidance may involve the scope and exercise of TIGTA's authorities and responsibilities; audit and investigative techniques and procedures; the impact of proposed and existing legislation and regulations on IRS and TIGTA programs and operations; and legal issues that arise in the conduct and resolution of audits and investigations. The Office of Chief Counsel also provides legal advice related to internal administration and operations and reviews subpoenas issued by TIGTA.

In addition, the Office of Chief Counsel’s Disclosure Branch processes requests for records maintained by TIGTA made pursuant to the Freedom of Information Act and the Privacy Act.

The Office of Information Technology (OIT) provides information technology products and services that support the successful accomplishment of TIGTA’s mission and strategic goals. OIT has responsibility for TIGTA’s telecommunications network, technology standards, information security, and integrated application development. OIT also ensures compliance with Federal statutory, legislative, and regulatory requirements governing confidentiality, integrity, and availability of TIGTA’s information technology systems, services, and data.

The Office of Data Analytics (ODA) provides leadership, direction, and technical expertise over the collection, organization, analysis, delivery, and use of data as a strategic asset to support and further the mission of the agency. The ODA:

• Promotes the sharing and access of data to support the most important and complex investigations, audits, inspections, and evaluations;
• Develops and leverages advanced data analytics to derive meaningful insights across the TIGTA enterprise;
• Creates strategy for the governance of data assets; and
• Oversees services and operations to effectively implement standards and principles to ensure quality, accuracy, and protection of data.