Where I live currently, they require several ass-in-seat days. Could be tests, could be classes, I'm not sure, offhand.
That assumes that the state you were homeschooled in graduates you, which in NYS at the time, was only if who you were being taught by was an accredited "education professional", as defined by them. My mother was a former primary education teacher, so I got better from her tutelage than I ever would've gotten from the state public system (just comparing what I learned to what my friends came out of the system knowing... or rather, not knowing).