This page provides information on immigrant visas and permanent resident cards (also known as a green card). OCA-Greater Houston provides free assistance preparing N400 Citizenship applications for individuals with Green cards (Legal Permanent Residents) each month.Correctly file form I485, Application to Register Permanent Residence or Adjust Status. If you are engaged and wish to bring over your betrothed to get married in the states, your first step is to complete Form I-129F Petition for Alien Fiancé(e). Be at least 18 years of age at the time of filing. Also, the alien and U.S. citizen must have met personally at least once in the two years before the petition was filed. Be at least 18 years of age at the time of filing. Learn about the Diversity Visa Lottery and other ways to apply for an immigrant visa. If you have had your legal permanent residency for 5 years you may be eligible to apply. You have to have entered the country legally in the first place, be admissible and meet all qualifications to apply for a green card through this process.