If you are receiving Social Security benefits your medicare premiums that are deducted from your benefits already flowed from your SSA1099 to the medical expense section of the program. So you do not have to enter it again. If this is not what you were asking about, please post back.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**