回複：Question about parents B2 visa extension and re-entry

Hi Drive, I don't know the answer, but may you let me know how much you sent with your parents I-539,$300 or $600? I wrote a check with $600 and got rejection due to incorrect check amount and when I can USCIS guy he said I need to write 2 checks each $300, but somebody told me I only need to pay $300.Now I am confused. Thank in advance.