In your ISN go to Settings -- Office Settings -- Interacting with my Clients and Agents -- Real Estate Pro Dashboard.
Check the box labeled Allow my Agents to add notes to their orders.
Then scroll down and hit Save Settings.
Then a new text field will show up at the end of the scheduling process before the agent confirms their order.
If you have any questions please feel free to open up a chat, email us at email@example.com or call us at (800) 700-8112.