What happened to Harriet on Family Matters?

In the sitcom "Family Matters," Harriet Winslow, played by JoMarie Payton, undergoes a significant change when the show transitioned to its later seasons. Initially a central character, she eventually left the series in 1998 after the show's ninth season. Harriet was written out as she took a job in a different city, allowing her character to move on while other storylines continued to focus on her family and their interactions, particularly with Steve Urkel.