Cobrowse it used when you are on the phone with a TurboTax agent and you are going to share your screen with them.
Please see How to Allow a Support Professional to View Your Screen for additional information.
Thanks
Cobrowse is the program that allows you to share your screen with a TurboTax agent and you are on the phone with the agent. This link
How to Allow a Support Professional to View Your Screen has information you may find useful.