IRA for members of the clergy

I have searched the web for a definitive framework for a member of the clergy and a traditional IRA.  I agreed to do a return to help a member of the clergy, Turbotax is not getting the answer that I expected for his maximum.

 

He has a wage, an excess housing allowance which is considered earned income, and a schedule C  profit (see publication 451).  I expected to find this total on the IRA work paper, but instead, TurboTax only allowed the excess housing allowance as eligible for the IRA.

 

Any ideas?