Contact the Special Diets department of Disney Dining at the following e-mail address:
WDW.Special.Diets@disney.com
Ask them for an electronic copy of the "Guest Allergy - Dietary Request" form, as well as lists of the Allergy Free meals/options at the parks, resorts, waterparks, and Downtown Disney. Once you get the "Guest Allergy - Dietary Request" form just fill it out and e-mail or fax it back to them. You can also call Disney Dining and ask them to list the allergies on each reservation.
My wife & our 16 year daughter have numerous allergies each to include gluten, dairy, strawberrys, coconut, fish, chili peppers, and some others (I'm waiting for them to become allergic to air). Our daughter has just been finding out all of this over the past few months, but my wife has known for years and has visited Disney knowing about the allergies. Disney has always been great and have always made meals & desserts for my wife that she really enjoyed. Now she always looks forward to the meals on our Disney trips more than anything.