Hi @kalakaramad_20
The related list Task in the Customer Case [sn_customerservice_case] form is the Customer Case Task [sn_customerservice_task] table.
So you can control the Create ACLs to show/hide the New button according to your requirements.
And within the Workspace, you should find the Button with the following URL.
URL: https://<instance_name>/sys_declarative_action_assignment.do?sys_id=5555b77273131010a0a79329faf6a780
It's a Global action assignment, so be careful with your changes.
Cheers,
Tai Vu
