You can't enter room and board expenses yet. This is a known glitch in TurboTax (TT). They are working on it (no announced fix date). The 2025 education and 529 sections appear totally redesigned, from last year.
Any update on this?
Post from an Employee Tax Expert, Tuesday Feb 10, at another thread, on this same topic: "This is currently being investigated and we are informed that the issue should be fixed during the upcoming update this Friday, February 13. Please check back after February 13 to confirm whether or not you are still having issues with this."
At the screen "Did (student's name) have any of these common situations in 2025", check the box "had education expenses other than tuition".
That will get you a screen, later, "Time to enter (student's name) educational expenses". Enter those expenses at "Optional books and materials from the school".