If all of the 529 went to qualified expenses, it is not required to be entered. See page 52 for qualified distributions at IRS Publication 970, Tax Benefits for Education.
Please see my 529 example with IRS information here.
The IRS says in Publication 970 (2020), Tax Benefits for Education | IRS: When figuring an education credit or tuition and fees deduction, use only the amounts you paid and are deemed to have paid during the tax year for qualified education expenses.
@mamarama The room and board would be part of the 529 expenses, if you actually need to enter the 529 - which I doubt.
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