There is no federal deduction for that; so there is no where to enter it, in the federal section of TurboTax.
Some states allow a deduction on the state return. If your state is one, it
will come up in the state interview. For a list, see:
http://www.savingforcollege.com/compare_529_plans/index.php?page=compare_plan_questions&plan_questio...
