Treatment Family Care Services Act This bill requires the Department of Health and Human Services (HHS) to issue guidance outlining opportunities for states to fund treatment family care services through Medicaid, the Payments for Foster Care and Permanency program, or other HHS programs. Treatment family care services are structured, daily emotional and behavioral services and interventions provided in a home-based setting for children less than 21 years old. Additionally, HHS must develop and issue guidance about best practices for states to establish treatment family care services programs.