I got my green card in December 2010, and want to apply for citizenship next September. However, I'm outside US from June to August 2012 and November 2012 to June 2013 (longer than six months) because of school. Moreover, I first applied and got the reentry permit approved in October 2013 since I want to finish my college in my hometown, but I finally decide to suspend school so I never used RP and I will stay in US until I got my citizenship. Can I still apply next year? Or when is the earliest? Thank you.