I am trying to de authorize my computers however I cannot find where in the store in my apple id I can find computers??

You are referring to iTunes? Open iTunes > Menu Bar > Store > and authorize computer. You can only do it with the one you are currently signed into the iTunes Store with, so you will need to do this with every computer you want to authorize.

Edit: I missed the 'de' in your post - but, as you can see, you can de-authorize it as well.

If you're trying to deauthorize a computer you don't have access to, use the Deauthorize All command documented in this article, or if it isn't an option, the 'contact iTunes Store support' link at the bottom of it.

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