I'll post the whole she-bang in the answer box below. But basically, when all qualified education expenses are covered by scholarships, grants, 529 funds, there are NO tax benefits to be had by the parents. Additionally, if there is any excess funds not used for qualified expenses, that excess is taxable income "to the student", not the parent. On top of that the student will be taxed on those excess funds at the parent's higher tax rate. So when your student reports all this stuff, you can expect them to be contacting you for information from your tax return. They will need it in order to correctly report the income, as required by law.
