Over correction/positive practice helped us. We also put him on toilet every 15 or 20 minutes.(not sure) After he went once, we reduced to every half hour or 40 minutes. We kept him home for 3 days. just for this. We did not even go to the playground. He wore a diaper to bed for the night. He went independently after about a week. Pull up over underwear when we went out. Accidents completely stopped in a month. We removed night pull up shortly after. He never had a night accident. Probiotic helped loose stools. It helped to give him a pop up book because he is so wiggly. He used real toilet (he was almost 4) He did not want to sit on ring, so we removed it. We gave him a special toy to play with or sticker and poured on the praise after he went. Pictures around house to remind him. If he had an accident, we told him that it goes in potty. Not in pants. We walked him to location 3 times and repeated that phrase. We had him clean it up. The best memory was walking through the city to therapy and having him look up at me and say "I need a toilet!"

Thanks everyone very helpful..!

We used a board maker visual schedule to remind him of the steps and toilet photos around the house.

Sounds disgusting but visuals worked really well for us. My mom laminated visuals from online that showed steps to going to the bathroom. We posted it in the bathroom and got him on a routine. It took about awhile but finally at three he got it!! Kids on the spectrum usually respond well to routine so try to be consistent. Resist the urge to yell. It never works!