Please use this link for self-help resources for Guardianship and Conservatorship.
https://www.utcourts.gov/en/self-help/case-categories/gc.html
The Online Court Assistance Program will help you prepare documents you will file with the court for guardianship of an adult. If the guardianship needs to be filed over a minor child who will soon turn 18, the case may be filed as soon as the child is 17 years and 6 months of age or older. If filed before a child is 18, the guardianship becomes effective on the child's 18th birthday.
You will be required to register as a user for this site but that only requires your name, address and an email address. Please click the link here. https://pubapps.utcourts.gov/OcapWEB/