I have H4 visa stamping validity till Oct 2018 and I 94 when I entered US they gave till Aug 2018. But my husband’s H1B visa is valid till 7th April 2016. Now he is applying for H1B extension. Do I need to fill I539 form for my H4 extension? I am thinking as I94 and Visa is valid till year 2018, we no need to apply for H4 extension. Can you please clarify?