Should I apply to Harvard and other U.S. colleges?

I am an international student and am currently taking A levels. The intake I am enrolled in is a ‘rush’ intake, which means instead of the usual 1 year 6 months, I’m doing my A levels in 1 year 3 months. So I will be done with A levels in June 2017. Currently, I am midway through my AS level exams. Can I apply this year instead of next year? As I’ve heard a lot of people say that students usually apply with A2 forecast results, which is impossible in my case, as I am still in AS, and will only start A2 in January 2017. And I don’t really want to take a gap year.

Also, in the education section of the CommonApp, do I use my IGCSE grades or A-level grades or both?

Thank you.

Both