How to discipline a 8 year old boy with adhd or teach not to do what he ain't suppose to do?

Duplicate question, : though you 1st stated that he also has Autistic Spectrum Disorder. A Developmental/Behavioral Pediatrician & other specialists can clarify his Neurodevelopmental Disorders, look for underlying causes & define his developmental levels. Then seek behavioral therapy to learn to state rules at his language level, follow through with immediate consequences & use other effective behavioral techniques.