I am an iranian with an immigrant permit in buffalo new york.

Rahmat, you can apply from the consulate in New York. The basic documents you need to prepare are your passport and its photocopy, a duly completed application form affixed with a bare-headed color photo, and the original and photocopy of your US residence permit. Besides, you need to submit some supportive documents according to your travel purpose. If you travel for leisure purpose, you need to submit round way ticket and hotel booking order copies.