Help with marking race on school forms

Hello all My daughter will be starting school soon and I'm torn on how to mark her race on the school forms. Her father is 1/2 white and 1/2 black and I'm white which makes her 1/4 black. On medical forms we always mark caucasian and African American because we feel like that's important for medical purposes. We always said we'd let her decide if she wants to identify as white or mixed race (she looks exactly like me fyi). Is it correct to continue marking her both races on school forms? Or is that being disingenuous? I don't want to do the wrong thing and my husband has no opinions whatsoever lol