How does the holder of a K-3 or K-4 visa apply for the immigrant visa?
If you are physically present in the United States you may apply for an adjustment of status with the USCIS. If this is your intention, you should state this fact in answer to Q.21 of form I-130. If the I-130 has already been filed and you advised the USCIS that you would apply for the visa abroad, your spouse or parent should notify the USCIS that you will apply for an adjustment of status. If you will apply for the immigrant visa at a U.S. Consulate or Consulate named on the immigrant visa petition, form I-130, the approved petition will be forwarded to the National Visa Center in New Hampshire which will send you the packet of forms you are required to complete in connection with your application for an immigrant visa.