I'm 58 and not ready to go home yet. I have an office job but I'm under a lot of stress. I have to schedule about 3000+ people/day.
If the stress makes your Parkinson's worse, then it might be a good idea to find a job with less stress. If you find that the Parkinson's is causing you to make errors in your job that you wouldn't normally make, then you might consider leaving, either to a simpler job or none at all.