Q: Address for service

I found this link in the Contact Us section at the bottom of this page.

https://locate.apple.com/

You enter your location to find the nearest place that provides Authorized Apple Service.

or

https://getsupport.apple.com/

Secondly, Apple does offer somewhat lower prices to educators.

http://www.apple.com/us-hed/shop

Assuming that these are the flat panel iMacs, the serial numbers are on the bottom of the feet. Find the serial number on your iMac - Apple Support

Otherwise check Find the serial number of your Apple product - Apple Support

There is no where to "send" them. The best bet is to take them to the local Apple store -> http://www.apple.com/retail/

To find a local Apple Authorized Service Provider in your area, go to > https://locate.apple.com/ click on Service and enter your current location.

Go to your local Apple store. They have live people to talk to there.

It is simple. Go to and open the link that I provided, put in your area code, select a product (Mac for example) and press Go. You should then see a map and list with telephone # for your local AASP's.

We are just other Mac users like yourself here, so we have no idea which one is the best to call first.

Personally, I would start by calling the nearest one first.