Did your daughter apply for need-based financial aid from Boston University by submitting FAFSA and Profile? If so and you are looking for more (or some) need-based financial aid, you need to make an appeal to BU. The school probably has an established process for doing this. The questions you ask here need to be addressed to the BU financial aid office.
Edited to add: this may help.
https://www.bu.edu/finaid/apply/special-circumstances/reconsideration/