Hi Karsten,
Thanks for your help and input.
I have Marketing Hub Professional, Sales Hub Professional, CMS Hub Professional.
I have a user that would like to create tasks for her boss and then be notified when he completes them.
We did end up creating a Deal-based workflow to accomplish this. When creating the task, a deal must be associated and then things seem to be working as expected. If the task is completed, an email is sent to my user notifying her.
Thanks again.