Welcome to planDisney, Cheryl!
My parents try their hardest to plan vacations around their children's schedules. With four kids, we will inevitably have one or two modifications to our original party.
Cheryl, to add your daughter to your reservations you will want to log into your
My Disney Experience Account. Once there, hover over the blue My Disney Experience icon on the upper righthand portion of your screen and click "My Plans."
To the right of your room reservation, you will see a blue button that says "Change Reservation." Once you click on this, you will be able to update the members of your traveling party.
If you do not see the blue "Change Reservations" button, you will need to contact the friendly Reservation Cast Members at
(407) 939-1936.
I hope that this helped, and I am so happy your daughter is able to join you.
Happy planning!
Sarah B.