Can you regain custody of your 18 year old daughter after she turns 18?

Once a child turns 18, they are legally considered an adult and have the right to make their own decisions, including where to live. Therefore, you cannot "regain custody" in the traditional sense, as custody laws apply to minors. However, if you believe your daughter may benefit from your support or guidance, you can try to rebuild your relationship and maintain open communication. Ultimately, the decision about where she chooses to live is hers.