There is no way to accurately assess for autism just through online tests. Autism is diagnosed based on reports from early childhood, extensive self-reports, and neuropsych tests. Similar disorders such as ADHD and learning disabilities will also be assessed and potentially ruled out. Prepare yourself for the possibility that you may have a different disorder. Don't think ahead about it and be honest.

Embraceautism . Com is a great reference place. They've got check lists and experiences listed on the website