After you file

On where?   

Enter Medical under
Federal Taxes Tab
Deductions and Credits
Then scroll way down to Medical
Then Medical Expenses - click Start or Update

 

Did you get a 1095A?  Where to enter a 1095A
https://ttlc.intuit.com/community/credits-and-deductions/help/where-do-i-enter-my-1095-a/00/26456