How do you change my childrens last name to my husbands last name?

To change your children's last names to your husband's last name, you'll typically need to file a petition with the family court in your jurisdiction. This process may require both parents' consent, depending on local laws. You'll likely need to provide a valid reason for the change and possibly attend a court hearing. Once approved, you'll receive a court order that you can use to update their names on legal documents like birth certificates and Social Security records.