The main purpose of this legislation is to require that the $20 bill in the United States features a portrait of Harriet Tubman. This change aims to honor Tubman's significant contributions to American history, particularly her role in the abolition of slavery and her work as a leader in the women's suffrage movement. Key provisions of the legislation include a mandate that no $20 notes can be printed after December 31, 2028, without prominently displaying Harriet Tubman's portrait on the front.