If you wish to apply for a Returning Resident (SB-1) immigrant visa, you should contact the nearest U.S. Embassy or Consulate in advance of your intended travel (at least three months in advance, if possible) to permit sufficient time for visa processing. As part of the visa application process, an interview at the U.S. Embassy or Consulate is required. You need to be mindful of the country-specific instructions and information by reviewing the U.S. Embassy or Consulate website where you will apply.