II 118th CONGRESS 1st Session S. 625 IN THE SENATE OF THE UNITED STATES March 2, 2023 Mr. Grassley (for himself, Mr. Wyden , Mr. Wicker , and Mr. Cardin ) introduced the following bill; which was read twice and referred to the Committee on Finance A BILL To amend the Internal Revenue Code of 1986 to modify and reform rules relating to investigations and whistleblowers, and for other purposes.