1. If you are filing for your spouse, he or she must complete and sign Form I-130A, Supplemental Information for. If you are an immediate relative of a US citizen, you can become a lawful permanent resident (get a Green Card) based on your family relationship.Use this form to show they have adequate means of financial support and are not likely to rely on the US government for financial support. You will need to file an USCIS's I-130 form (Petition for Alien Relative) and an I-485 form (Application to Register Permanent Resident or Adjust Status). Form I-130: Petition for Alien Relative is the first form you must file to start the marriage-based green card application process. You will need to file a Form I129F, Petition For Alien Fiancé(e). This is the first step to obtaining a K-1 nonimmigrant visa for your fiancé(e). Fill out their alien registration number if applicable, USCIS online account number and SSN. You will file the form with your spouse; provide evidence of a bona fide marriage, which we detailed previously; and complete an interview with USCIS. If you want to become a naturalized citizen to be with your U.S. citizen spouse or for another reason, the first step is to fill out an application.