We recently shot and edited two services for a local church. After shooting and editing, they then got us info from the tv station ( cart before horse).
The tv specs, among other things, require close caption
We edit in Premiere CC,and have never had to do this.
Anyone have this experience?
Thanks
Bruce Yarock

https://helpx.adobe.com/premiere-pro/using/working-with-captions.html

If you're a Premiere Pro CC user, it's worth it to move to PP CC 2017 for a captions project - it got a lot easier with the latest release.