Your TA should call and have the allergies noted on the ADRs. This is part of your TA's job.
That being said, if the allergies aren't noted then it won't be a problem. When you check in at the podium, tell the CM there that you have somebody in your party with allergies. The CM will stamp the slip of paper they give the server and the server will notify the chef. We've had many ADRs over the years where somehow the note about our allergies was missing from ADRs yet the chefs were still just as great about taking care of us.
If she has any non-top 8 allergies or she has 4 or more allergies then you can contact the Special Diets department and they're supposed to notify the chefs ahead of time that you're coming (not that it usually makes a difference since the chefs really are great with allergies, but occasionally a chef will do something special if he knows ahead of time).