Stop in for a cup of coffee

dukeboy_318 said
I may have found a loophole. maybe, it says I can mail it if postmarked by today. Problem is, our local USPS is closed to walk in services. So I don't know if I can guarantee itd be postmarked today

Take it to the main post office in town and put it in their mail box. It should be stamped today. Our PO never closed its walk-in service.