How to Assign a task in 2020 Fusion
1. Run 2020 Fusion and go to File Tasks New
2. Fill in the resulting Create New Task window with due Date, Assignee, Select Global or Customer Task and details of the required action, and then select OK to complete.
N.B. If selecting a customer task, you will see a new field within the window to enable customer lookup.
This will now create the desired task for the desired user.