While Scout mentions that Helen is "afraid to go back" to Maycomb after Tom's death, there's no mention of her finding employment. She's likely left to fend for herself, facing immense prejudice and hardship in a town that has shown her little sympathy.
The story focuses on the trial and its aftermath, leaving Helen's future ambiguous. It's left to the reader to imagine her struggles and how she might cope with the loss of Tom and the hostile environment she faces.