It should be in your duty list like it says in your screen shot, you either have it some where else where you can't see it or turned it off.

If you have it on but can't see it:
1.) go to SYSTEM
2.) go to HUD LAYOUT
3.) in the drop down box find DUTY LIST

if you have disabled it:
1.)go to SYSTEM
2.) go to CHARACTER CONFIGURATION
3.)go to UI SETTINGS
4.)scroll down to CHARACTER INFORMATION
5.) make sure that DISPLAY DUTY LIST is checked and save it, you should than be able to see it

if you still can't see it than repeat the steps for the "If you have it on but can't see it:".

If that doesn't work than I will try to think of something else for you but i really don't know what else it could be.