If you had health coverage thru your employer and were issued a 1095-C, this form does not have to be entered in TurboTax. Just keep it for your records.
You'll still need to go into the Healthcare section and answer the first question, telling TurboTax whether you had coverage for the entire year. If your 1095-C was for full-year coverage, then there's nothing more you need to do.
If the 1095-C was not for the whole year, and you had other coverage and received a 1095-A, then you'll need to enter that information.