It sounds like you  want to submit something to reduce the risk of audit. That has an assumption that the attachment is actually looked at by anyone.

You would attach just like with a regular return and direct it to be with whatever form the original 1040 would be attached to. 

Sounds as if you did not get a 1098-T and want to support what should have been on it. It would be better to get the client to contact the college and get a 1098-t.