回複：再求教 8老師 the checklist for父母辦延期（B-2),叩謝！！！！

if my father is the major applicant , I-539(one form for both parents), i-130(one form for both parents), paretnts passports, visa,i-94, and letter to VO, check pay to USCIS.
-I-130 is for immigration, not need it for your parents' B2 extension.