I'm only getting a small percentage of the health insurance deduction on line 29 apparently because the 1/2 se tax deduction is including the se tax calculated on the w2 wages and the housing allowance.  This doesn't seem right to me, i'm thinking that he should get 100% deduction as long as the health insurance does not exceed the 3 schedule Cs less 1/2 the se tax associated with them.  Am I thinking right?  Thanks in advance for any thoughts on this question.