Can your 21 years old illigitimate daughter get inheritance from the deceased father even without a will?

Yes, an illegitimate daughter can inherit from her deceased father even without a will, depending on the laws of the jurisdiction where the father lived. Many places recognize the rights of children born out of wedlock, granting them inheritance rights similar to legitimate children. It may be necessary to establish paternity legally if it hasn't been done previously. Consulting with a legal expert in estate law is advisable to navigate the specific requirements and processes.