State tax filing

A follow up question:while a partial resident of MI, I bought health insurance through the marketplace for 2 months before my employer's health insurance kicked in. I received a form 1095A, and I filled out the field for the federal return. However, when I proceed with MI, but I don't see where  I can write the premium I paid post taxes in the MI Household Resources Worksheet (Column A , line 17a has a $0 and won't let me change it with the actual amount I paid). I added $310 in Column B, but clearly doesn't match the $0 on Column B. How can I modify Column A?