I think you can apply if you have a Green Card: https://www.lsac.org/lsat/lsat-dates-deadlines-score-release-dates/lsat-fees-refunds/fee-waivers-lsat-credential
But if you don't, I think you should call LSAC to ask.
... ; The July 13 in-person LSAT (USA, Canada) is canceled< ... June 27-28 in-person LSAT (International) is canceled
& ... gt; Instead, registrants can take LSAT-Flex during the week of ... .lsac.org/update-coronavirus-and-lsat/lsat-flex)
if you withdraw registration i believe you would only get back $50 if done so by September 4th. https://www.lsac.org/lsat/lsat-dates-deadlines/october-2020-lsat-deadlines-united-states-including-puerto-rico-us-virgin
LSAC mentions on their website that the last day you can register for the November lsat is September 23. https://www.lsac.org/lsat/lsat-dates-deadlines/november-2020-lsat-flex-deadlines-united-states-including-puerto-rico-us
According to LSAC, 9am. See the bottom of this page: https://www.lsac.org/lsat/lsat-dates-deadlines/october-2020-lsat-flex-deadlines-united-states-including-puerto-rico-us