Foster Care - As enacted, expands the provision of voluntary extended foster care services by the department of children's services to include young adults between 20 and 23 who were in the custody of the department at the time of the young adult's eighteenth birthday and young adults who were adopted from, or approved for subsidized permanent guardianship by, the department of children's services at 16 or older. - Amends TCA Title 37; Title 49 and Title 55.