Just remember she needs to contact the school to find out their policy. For instance our school district allows a child to move from private k to 1st grade, even if they are below the age of other 1st graders, but they won't let any children start kindy early (at least that is what I have been told).
Or they might have testing preferences. (Tests they prefer to see)
Or they might even do the testing for her! Some schools do...My sister in TN had her daughter tested to skip k and go into 1st, and the test admin said, oh well most people are here to have their children tested for early entrance into k! (She just didn't know it was possible)