Room & Board (R&B) is only a qualified expense for the 529 Plan distributions. As such, TurboTax (TT) will not let you enter R&B unless you have first entered a 1099-Q. After entering the 1099-Q, later at the 1098-T section, answer yes when asked if you have book expenses. TT will then have the R&B box on the next screen.
If it's not there, you may have to delete the 1098-T and re-enter.
