This bill requires the Internal Revenue Service (IRS) to report to Congress on projections of the estimated tax gap (i.e., the difference between tax liabilities owed to the IRS and those liabilities that the IRS actually collects). The IRS may use artificial intelligence and related data analysis tools to calculate a tax gap projection. The bill also requires the Joint Committee on Taxation to issue periodic reports to the congressional tax committees on the tax gap projection. The bill restricts IRS funding to FY2021 levels for audits and enforcement until it publishes an updated tax gap projection. Funding is also restricted for certain purposes, including (1) targeting U.S. citizens who exercise their First Amendment rights, (2) targeting a group for regulatory scrutiny based on its ideological beliefs, and (3) auditing individual taxpayers with an adjusted gross income of less than $400,000. The bill directs the IRS to establish a fellowship program to recruit private sector tax experts to join the IRS to create and participate in the audit task force. The purposes of the tax force include performing audit case selection, educating IRS employees on emerging issues, auditing selected taxpayers, addressing offshore tax evasion, and identifying, mentoring, and training IRS junior employees with respect to audits.