Welcome to the Community, @jiterbug.
For now, we're unable to share with you the specific third-party app to use that may suit your business needs.
In the meantime, you may search for third-party applications that integrates well with QuickBooks and lets you file my 1095-C form electronically.
I suggest you visit the QuickBooks Apps site and look for an app that meets your business needs. You can also do this inside your company, just go to Apps on the left panel and then enter a keyword in the search field.
Additionally, allow me to add this article to learn about the Affordable Care Act and Employer Mandates: Understanding the Affordable Care Act Employer Mandates.
Let me know if there’s anything else I can help you with your filing forms in QuickBooks. It’s always my pleasure to help you out. Have a nice day!