"Mark the highest grade he attended even if he did not finish it. If he is still in school, mark the grade he is in now. If he skipped or repeated grades, mark the highest grade ever attended, regardless of how long it took to get there. If he finished high school, but did not go to college, mark 12. For college, mark the highest academic year attended."
[All]
22. Did he finish the highest grade (or year) he attended?
"Mark Finished this grade (or year) only if he finished the entire grade or year shown in question 21."