Harriet Tubman Bicentennial Commemorative Coin Act This bill directs the Department of the Treasury to mint and issue 50,000 $5 gold coins, 400,000 $1 silver coins, and 750,000 half-dollar clad coins emblematic of the legacy of Harriet Tubman as an abolitionist. The Secretary may issue coins under this bill only during the period of January 1, 2024, through December 31, 2024. All surcharges received by Treasury from the sale of such coins must be paid equally to the National Underground Railroad Freedom Center in Cincinnati, Ohio, and The Harriet Tubman Home, Inc. in Auburn, New York, for the purpose of accomplishing and advancing their missions.