Can you remotely deauthorize itunes?

I forgot to deauthorize my itunes account, is there a website where I can do this?

• Laptop was sold, itunes erased but I forgot to do that before I sold the thing. How do I deauthorize it now? I don't want others have access to my itunes library.

• Answer:

  You can only deauthorize it if you have reached your 5 authorization limit. launch iTunes, click iTunes Store, and then click your iTunes user name in the top-right corner of the store window. Once you login, you should see a page with all of your account information on it. In the middle of the page, you should see how many computers are currrently authorized. When you reach your 5-computer limit, a new button will appear here called "Deauthorize All." You can only do that once a year.