Continental Edison audio output

Hello,
I'm reaching out for help regarding my television. I recently purchased a Philips headset, I connected it to my TV using the Jack output and it works very well. Unfortunately, I've noticed that I cannot change the audio output, and thus I can't switch to the TV sound without unplugging my headset from the Jack socket. I've done several searches and found that everyone else can change this in the audio settings, but the option is not available for me. Can you help me? I want to clarify that I do not wish to have both sounds (headset + TV) at the same time, but just to be able to switch between the two without having to unplug the Jack cable.