Hi Nawal

What kind of task do you want to create?

Maybe creating a Flow in Flow Designer (triggered when you decide using some "criteria") over a table or a Catalog Item where the "Schedule retrieve date" (field or variable) is populated by the user you can create a task (task table, catalog task table, etc) using the create record action.

Feel free to give me more information about your Flow so I can help you

Please mark helpful or correct if I helped you
Thanks
Ariel