Listing it as "additional skills and experience" is a good idea. If you did manage to get some paid work through your self-taught knowledge, then it's a better idea to put that under the employment history section instead.
I taught myself website design and managed to get some paid employment out of it, so I always put that experience under my employment history. When people ask, I'm upfront about it and say that I taught myself those skills. Thankfully no-one has acted adversely to it. Actually, I managed to get one government contract job out of those self-taught skills.
_________________
Said the apple to the orange,
"Oh, I wanted you to come
Close to me and
Kiss me to the core."
Think you're ASD? Get thee to a professional!