After you file

So if he did file an expense report for each trip, but on this report he received a per diem rate for his meals (he provided the receipts for the meals he did eat but the per diem exceeded these meals) would this be counted as accountable? And would an accountable plan be already be included in wages or do we have to report it separately? The fiscal rep. my husband got the receipts didn't seem to think that they would be included with wages.