As I say in my answer above, "your Medicare wages (box 5 of W-2) must equal or exceed your total health insurance premiums for the year" and "Line 29 health insurance deduction is limited by your Medicare wages". I'm not saying to put your health insurance in box 5, I'm saying that box 5 wages is the limiting factor in whether you can deduct health insurance on line 29 of your 1040.
