1095-C Form is your employer based insurance. These forms need to be issued to you if you were covered by your employer or were offered insurance through them. This form is for informational purposes and won't be input in your return. (Some states, however, do have a place for this)
If you had health insurance through the marketplace, you should have received a Form 1095-A. This form does need to be enter in the system. If you didn't receive this form in the mail, you will need to contact your insurance marketplace. See the link below
The Health Insurance Market Place