In order to see the notifications when you are being tagged (by other users or when a change happens on a project or a task that you are assigned to, you need to have Assignment notifications turned on.
To set up your automatic email notifications, go to Settings under your profile at the top right corner of the dashboard. When you are in the Account overview select Preferences and turn on the Assignment notifications. Furthermore, you can turn off the Recent changes and System message notifications, if you wish to minimize the number of emails (see the image below).
