I was able to get time and a half for my son on the ACT. He was officially homeschooled at the time but had a history of having accommodations at various schools. For example, he was enrolled in a program for homeschoolers a the local public school and had a 504 there (that I got specifically so I could say he had a 504 when requesting SAT/ACT accommodations--in fact we enrolled him in the program for the same reason). He also attended a private school for a year and had an "accommodations plan" and was at the time I applied, dual enrolled at a community college where they gave him accommodations as well. I put all of that information in with the request.
We also had him evaluated when he was in 9th grade by a person with extensive experience with getting ACT/SAT accommodations for 2E kids. So, while the achievement scores on that test were average or better (sometime a lot better), the report explained about the discrepancy between his IQ and achievement. They also gave at least one test timed and with extended time to show the extreme difference in the scores.
