How to download
You first want to go here and download your version of teamspeak that works with your OS Downloads - TeamSpeak
Once on the main page which looks like this
You will enter your nickname as it is on the forums, then you will hit connect and make sure you set the security level to 22 will automatically do it for you.
Integrating teamspeak to forums
You will copy your unique id from here and paste it here;
After that you click save and you should be good to go