As custodian of the account, a 1099 Q will be issued to you. You will enter it in your tax return. Make sure you have indicated who the student is on the screen titled Student – see screenshot below. If you are not claiming your son as a dependent in your tax return, you will have to enter information about the student on the next screen. You will also then enter the tuition and other expenses (including room and board) information.
If you are claiming your son as a dependent, select his name from the list of people in your tax return. Then you will enter his 1098 T information in the tab - Expenses and Scholarships (Form 1098-T). Room and board expenses are not eligible for education tax credit/deduction. However, 529 disbursements can be used to cover room and board costs. This can be entered at Did _________ Pay for Books or Materials to Attend School? When your 529 disbursement exceeds your education expenses, this is one of the options. See screenshot below.
To report the 1099 Q in Turbo Tax:
Select Federal Taxes
Select Deductions and Credits
Select Show More at Education
Select Start or Revisit at ESA and 529 qualified tuition programs (Form 1099-Q)
To enter a 1098 T in Turbo Tax:
Select Federal Taxes
Select Deductions and Credits
Select Show More at Education
Select Start or Revisit at Expenses and Scholarships (Form 1098T)