In the Federal Health Insurance section you would just need to indicate that you had healthcare coverage but it was not through healthcare.gov or another Marketplace.
The 1095-C Form is for information and Does not need to be filled with your return. Be sure to review it for accuracy and keep for your files.
If you did not receive Form1099-HC, check the box to indicate you didn't receive a 1099-HC, and enter the name of your insurance company (or administrator) and your subscriber number or member ID.
This information should be on your insurance card.