excess real estate taxes on 2106 employee business expenses

My wife had unreimbursed employee expenses in form 2106 (not 8829). 

As part of this she had a home office. 

 

TT is saying that if we are not itemizing then to not include property taxes here and later put it in "EXCESS PROPERTY TAXES" - but I am not given an option to do so ANYWHERE. 

Again this is not form 8829, it is 2106.