My totally disabled child is becoming an adult

I have an 18 yo disabled daughter with Autism that will continue to be in a special needs school until 2023. She will be 19 yo in April 2022. She will qualify to be my dependent after the childhood years. Every year I claimed EITC with one child and child tax credit and filed married jointly. When will she become a dependent instead of my child and what changes will occur to the EITC and child tax credit  that I usually claim, if any?  Or they continue to be the same?