From the IRS Pub 970 chapter on 529 accounts:
Qualified Higher Education Expenses
The purchase of computer or peripheral equipment, computer software, or Internet access and related services if it's to be used primarily by the beneficiary during any of the years the beneficiary is enrolled at an eligible postsecondary school. (This doesn't include expenses for computer software for sports, games, or hobbies unless the software is predominantly educational in nature.)
Is the internet service at your home used primarily by your daughter?