If you need more time, you can request an additional four month extension by filing federal form 4868, Applicationfor Automatic Extension of Time To File U.S. Individual Income Tax Return (downloads as a pdf) by June 15.
But Ms. Chearavanont's broker, Jenny Park Adam of Brown Harris Stevens, told them in an email that "we'll work out the extension" and resubmit a board applicationfor another lease "prior to the end of the lease, " according to court documents.