I am a grad student. I was planning to go back to Nepal on december. But the problem is I have only 2 classes left which is one in fall and other in spring. In 2010, I took 9 in spring and 9 in summer since it was offered only in summer. So my question is:

1. I wanted to go 1 week earlier so I got permission from my professor too. So will I be able to go 1 week ahead?

Yes,provided that u r done with ur finals.

2. Can I only take one class in fall since my advisor said it is okay but I want to be sure.

Advisor(Academic or International).If Academic they know nothing abt immigration.I would suggest to consult with Internal Advisor.My school didn't allow intl students to take one class in one sem unless  u r in deadlock situation(1 course left to graduate at the end) coz of immigration rules.

3. On spring the class is online which I should be able to do it from nepal also and can I come little bit late on february but the classes starts on january.

Don't do that.

Please consult with International Advisor on:

1. Online classes and immigration status when u r in F1.

2.1 class this fall.