How to add attachments in the task editing window:
Click on Add attachments below Attachments.
Select one or several files.
In order to remove an attachment, click the Delete icon.
Tip: You can also add an attachment by dragging and dropping a document from a file browser or from the desktop to the task window.
Also see
Creating new tasks
Creating recurring tasks
Adding participants to a task
The task editing window
Parent topic: Creating Tasks