Is it haram to deprive heirs of their share of inheritance?
Short answer
Yes. Allah fixed the shares of inheritance and called them limits set by Him (4:11-14). It is not allowed to cut out a rightful heir, or to give one child more than the others without a lawful reason, in order to change what Allah has ordained.
This is general information, not a fatwa. For your own situation, ask a qualified scholar.
Questions about halal and haram
Is it haram to deprive heirs of their share of inheritance?
Yes. Allah fixed the shares of inheritance and called them limits set by Him (4:11-14). It is not allowed to cut out a rightful heir, or to give one child more than the others without a lawful reason, in order to change what Allah has ordained.