Guests staying at Disney resort hotels are eligible to make all of their meal reservations 180 days from the first day of their trip (using the 180 + 10 rule).
To make online dining reservations for your whole trip,
you'll need to let Disney know that you are staying on site. On the
reservation pages for the restaurants you'll see at the top of the page:
Log In or Register
If you log in or register before you make your reservations, you can retrieve and view them later online.
Retrieve Your Resort Reservation
Do you have a Resort reservation for the same days for which you're making dining reservations?
If so, please retrieve your reservation.
You should log into your Disney account AND input your hotel
reservation confirmation number in the appointed areas. Once you do
this, the online reservation calendar will expand to include the
entirety of your vacation.
Good luck and have a wonderful visit to WDW.