college room and board taxable?where enter in app or on form? related to a FAFSA question on the same

If some of a child/student's scholarship is used by the child/student, to pay room and board, is that taxable? If so, what line on the 1040 does that go on, or is there a form for that you normally fill out, that then rolls up into the 1040 ?  or where in the step by step of the app. We thought we DID account for it as taxable on our 2022 return, but don't know where to look.  Plus we need to know how to do it on the 2023 version.  One important point though, in case that matters -The student's college *requires* the student to live on campus for the first two years. My question also ties into a parent being asked the question on the FAFSA of: “ Amount of college grants, scholarships, or AmeriCorps benefits reported as income to the IRS . The parent pay taxes on these grant scholarships or benefits .”