Most situations will have tasks that need to be done. If there is a dedicated space for them, where you can keep everything under control. Tasks enable you to plan more effectively and realistically.
Open the project detail view or module detail view for creation. Click on the "+" in the upper right corner of the task box. A new view will appear and you'll have to input a name for the task you want to create. By clicking on the button on the bottom, the view will lead to its detail view.
Click the task name in the details view of the parent project or module you want to edit. It will display a new view, which lets you change specific data for this instance or turn back to old versions.
Task deletion is possible by clicking the little bin button in the edit view of the instance to delete. Deleting is just possible, if you own the task or have the right to change.