How can 18 year old child stay in Youth Circles till they are graduated

My 18-year-old is in her Senior year of high school and is still in the youth program in our ward. However, when she turned 18, she was removed from them I believe automatically. How can we fix this so she can continue to be in the youth circles.

Are you talking about the circles in the Gospel Living App? You posted in the Member Tools forum so I just want to make sure we are talking about the same thing.

The default circles for a member is based on the organization the member is in. Check with your ward clerk to see if your child is still in Young Women and not in Relief Society. If she was moved to Relief Society she can be moved back into Young Women manually. Once in Young Women she should have access to the circles she was in before. Note, it may take a few days after she is moved for her to be moved in the Gospel Living App. One way to make sure the Gospel Living App gets the change is to have her sign out of the Gospel Living App and then sign back in a couple of days after the clerk moves her back into Young Women.