For my first we were homeschooling 1-3rd grade (he spent age 1-3 in a birth to age three program and 3-5 in an ESE classroom and K in a regular classroom). When he re-entered public school he was nominated for testing by his teacher. Officially placed in sixth grade (took a while to get him tested).

Second son was nominated by me in K and missed the screening score on the KBIT by one question. I nominated him again a year later (required waiting period). Again wheels turned very slowly and he was identified second grade (passed the KBIT the second time and went on to further testing).