How to check if I have completed a quest

What is the easiest way to do that? I am in Icecrown realm if that makes a difference.

Easiest maybe is to run EveryQuest.

/script print(C_QuestLog.IsQuestFlaggedCompleted(1952))
This script doesn't work here right? I couldn't manage to use it.

I used this macro in the past

Code:

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/run QueryQuestsCompleted() print(GetQuestsCompleted()[1952] and "Complete" or "Incomplete")

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Thank you, got the job done.

thx!!!!!!!!!!!