I filled amended taxes adding my son's schooling I mailed it out in march of 2010 when will I get my refund back.

While the IRS has been back-logged on amendments due to the $8,000 First Time Home Buyer's Credit, four months is more than enough time to get your amendment processed.

Recommend you call them at 1-800-829-1040 and ASK if they even got the amendment. It could have been lost in the mail.