Hi, I am 22 years old and married. I am a green card holder in USA. My wife is staying in Canada with her student visa. I went to Canda in October and returned in USA after staying there for 4 months. How long I need to stay in USA to keep my green card valid? After that if I go back to Canada to my wife, continuously how long I can stay there & how frequent I should come back in USA? Please let me know.
Thank you.Can I apply for a re entry permit online or do I need to get a lawyer for that? How long it takes to get the permit once I apply for it? If I apply for a re entry permit, is it guaranteed that I will get that? How much is the fee for that?