Yes, TripIt allows users to add notes or comments to their travel plans. This feature is useful for personalizing itineraries or providing additional information that may be helpful during your trip. Users can attach notes to specific trip details, such as flights, accommodations, or car rentals. To do this, one can simply access the specific item within their itinerary and look for the option to add a note or comment. This capability enhances the flexibility of your travel organization, allowing you to remind yourself of important details or special instructions related to your plans. If you would like to know more about using this feature, it may be helpful to check the current web page for additional information or instructions.