This IRS Whistleblower Program Improvement Act aims to enhance the protection and awards for whistleblowers who report tax violations to the IRS. The bill proposes allowing whistleblowers to remain anonymous before the Tax Court, modifying IRS whistleblower report requirements, including the top tax avoidance schemes disclosed by whistleblowers, providing interest on whistleblower awards, and correcting deductions for attorney's fees. It also outlines specific effective dates for these changes. These amendments seek to improve the process and incentives for individuals to report tax violations and enhance privacy and fairness for whistleblowers throughout the legal proceedings.