To add a meeting note in Teams:

1. Open the Teams app and log in with your username and password.
2. Locate the meeting that you would like to add the note to from the list of recent meetings.
3. Once you have opened the meeting, click the 'Meeting Notes' button at the top of the screen.
4. Type or paste in the notes that you would like to be included in the fixed note for future reference.
5. Once finished, click 'Save' to store your meeting note in the meeting transcript.