Q. It will not let me file until I attach him, which I did, not sure what to change?
A. I assume that "attach him" means you added him, in the personal info section, as your dependent. Once he has been added as a dependent, you enter the "Educational expenses and scholarships" section of "Deductions and Credits". You identify him as the student and enter his 1098-T.
You may need to delete the previous educational info entered and start over. Go through the entire education interview until you reach a screen titled "Your Education Expenses Summary". Click delete next to the student's name. You'll then get the "Your Education Expenses Summary" screen again. Click the "Add a student" button.
As the parent of a student-dependent, you are allowed to claim the tuition credit based on his educational expenses.