Forcing one's daughter to wear the hijab
This is one of the most frequently asked questions. A father has legal guardianship over his daughter and he is entitled to order her to wear the hijab. He is to do this without using coercion or violence but is to use the Islamic manner of raising children.
There is no relation between wearing the hijab and financial support — it is obligatory upon a father to support his daughter whether she wears the hijab or not.
One of the aspects of mercy in Islam is that it does not make neglect of Islamic duties a reason to withdraw financial support. Indeed, in this case, the father is obliged to financially support his daughter.
Allah the Almighty knows best.