Regular Process Application with Buffalo

Hi, I have been in the US for 1 month but am permitted to stay in this country legally for 1 year. I have a question about the impact of the possible processing time of more than a year as I will leave for my home country after that. Would my leaving the US affect my application with the immigration? If I am approved for the skilled professional worker visa, where will they send approval notice? To my home country or to the original address that I would put on my application.

I may have other questions as well but will post them later.....

Thanks for any help that I can get for now. This is a wonderful forum to have and I have read quite a bit about the various topics and they have been really helpful.

Thanks.