Quests you can activate but not turn in

[Estellios]

They lock you out of turning in quests if you are trying to turn it in on a class that is too low level (example: Trying to turn in a level 20 quest on a level 5 class). So far I have never run into a quest that somehow gets higher level when you turn it in. Also quests that require you to give a NPC an item remain "locked" until you actually get the item.

However, you might be confused by the quests that let you pick a reward. "Complete" will be blacked out until you pick a reward out of the options.