To add and remove channels from your Smart TV’s guide, here are the steps you need to take:

1. Press the “Settings” button on your Smart TV’s remote.
2. Navigate to the “Channel” or “Tuner” option and select it.
3. Press the “Antenna” or “Cable” button and select your provider.
4. Choose the “Scan” or “Auto-Tune” option to search for available channels.
5. When the scan is complete, a list of available channels will be available for you to add or remove.