How to calculate and report excess 529 distributions

My wife and I setup a 529 fund for our nephew. The year 2018 was the first year he requested a 529 distribution. He also receives grants of $6,584 and student loans of $12,442 in 2018. I see where to enter his grant figure in TurboTax but I’m not seeing where to enter his loan information. Would someone please enlighten me?

Also, if there are excessive 529 distributions, does the 529 owner or the 529 beneficiary include the excess as income, based on the earnings for that distribution?

THANKS.