Where do I enter the code? On your phone or computer, go to hbomax.com/tvsignin . You should see an Enter Code page where you can enter the 6-character code from your TV .Open the Google Home app on your phone or tablet. Tap the device that you want to cast to. Tap Cast my screen Cast screen. Once your screen appears on your TV, open HBO Max and start streaming.Make sure you have the latest version of HBO Max. To do this, on your Android TV move the selection to the HBO Max tile, and then press and hold the select button. Then, choose View Details and then Update (if available). Make sure you have the latest software updates on your Android TV.