緊急求助！E-File Texas材料接收問題

上星期三efile,昨天把材料express mail到Texas的P.O.Box 851391。今天上網track,被告知"We attempted to deliver your item at 10:33 AM on April 3, 2007 in MESQUITE, TX 75185 and a notice was left. A second delivery attempt will be made. If unsuccessful, we will hold it for five business days and then it will be returned to the sender."
請問e-file幾天之內必須寄出材料？我如果等second delivery fail之後再寄一份材料，還來得及嗎？
站內考古，發現上個月也有同樣情況，不知後來如何處理的。
http://web.wenxuecity.com/BBSView.php?SubID=immigration&MsgID=267124