If I pay Medicare Part B and Tufts Health Plan, do I list that under the additional health care premiums paid

[MargaretL]

Yes, you can enter the premiums in the Medical Expenses section in the Deductions and Credits. When going through the Health Insurance section, all you have to do is indicate that you have health insurance coverage all year (if applicable) and that you were not enrolled in other plans (such us Obamacare of Healthcare.gov plan).