Just put exactly as it is on the forms, they know what’s standard for each age. That’s there job to know all that because it’s that what your award is based from, do they need more care than a standard child of the same age, so (I think you said your ds is 7?) they will know what is standard for 7. So just write everything as it is at home.
So for instance, If I were to describe my ds now, at 9 years old, I would put he needs fully supervising at all times for his own safety, needs dressing, drying, bathing, he needs everything done for him as he isn’t independent at all, I would input all the care he requires at school, so he’s in a specialist school, small class size, 3 teachers to 8 children and lots and lots of 1-1 time, he goes by taxi needs a Pa in the back with him for safety, has a harness to keep him safe in the car,
I would list all medications he takes, explain about the night time care he requires, ie awake at silly o clock, despite being on 2 sleep medications, requires someone with him at all times he is awake due to supervision etc,
I would explain all the care he needs out of the house to keep him safe, I would explain what would happen if he wasn’t supervised (ie his immediate death 😂)
Just really spell it out, nothing you write is too much, send in as much evidence as you can, reports, copy of ehcp, I got ds school to sign the statement inside which said he requires 1-1 care and he was a flight risk etc, just back up as much as you say as you can.
You can ask citizens advice to help you with the forms they have specifically trained people to do this.
I never used a organisation. I used the cerebra guide open mentioned.