There are multiple ways to do this, but this is the easiest way to show what is on your computer on the TV (and vice versa).
First, on your TV, click on the InstaQShare app. If provided the option between Presentation mode or Moderator mode, choose Presentation mode.
On the right side of the screen, you will see a TV number, that looks like "InstaQShare-1550". In the future, there will be instructions on how to rename your TV to a more friendly option.
On your computer desktop, you should see the InstaQShare app . Open it up, then find that same number on that is listed on your TV. Click on that number, and click share screen. You can now see and control your computer through the TV. You can also do the opposite (see and control your TV from your computer) by clicking Screen Mirror.
If you do not see the InstaQShare app on your computer, open up a ticket and include your computer number.
To get your computer number, look on your desktop background, and next to Host Name, you should see a number that will likely be in the format DT17-XXXXX.