I accepted this quest in Ironforge, but when I click on the quest it is telling me to travel to ThunderBluff. It should be showing outside of Stormwind.

U are not providing enough information. Please provide quest name and if possible link to wowhead page of this quest.

Sorry, here is the quest: https://www.wowhead.com/wotlk/quest=7905

With newest Quest DB it shows location in Terrokar Forest, which is one of 3 locations he can be. Thats first location found in WoWHead DB. Carbonite doesnt support multiple locations of end NPC.