I think you mean, the Self-employed person has a policy for health care coverage that is Not covered by Medicare. Social Security is not Medical.

You can google:

self-employed health insurance deduction proconnect

And you get Help articles:

https://proconnect.intuit.com/community/medical-tax-credits-and-deductions/help/generating-the-se-he...

https://proconnect.intuit.com/community/medical-tax-credits-and-deductions/help/how-do-i-enter-the-s...