The Internal Revenue Service (IRS) is turning to artificial intelligence (AI) to help select tax returns for audits, aiming to narrow the tax gap. A recent Government Accountability Office (GAO) report emphasizes the need for consistent and transparent use of this technology. The IRS is piloting AI models to improve the efficiency and selection of audit cases for its National Research Program (NRP). However, the agency has not fully documented key components and technical specifications of these models, which the GAO recommends addressing to ensure clear communication and assessment. .....