It depends. If the scholarships your son received exceed the qualified education expenses, your son reports the excess as taxable income on his tax return using the Deductions and Credits>>Education section. You do not report that scholarship as income on your tax return, but you do get all the education tax benefits associated with the 1098-T.
If the scholarships received were less that his qualified education expenses, your son does not need to report anything associated with the 1098-T on his tax return.