There are multiple ways to view existing Tasks — within your Workspace, or within a specific Project. To view it within your Workspace, navigate to the left-hand side and click Tasks. Within a Project, you will find Tasks under the project drop-down menu.
All Tasks assigned to you or that you assigned to someone else are located within the Tasks page.
Only 'Admin' account types have the ability to edit Tasks not assigned/originated by them.
Shown below is the Listing Page:
Shown below is the Kanban view. You have the ability to create a custom view within the Kanban board by switching to Custom View and clicking Actions > Create New Column.