By Chris CasteelStaff writerccasteel@oklahoman.comOklahoma election officials are encouraging people who intend to file as candidates next week to do so by overnight delivery service, though in-person filing is still expected to be offered.Filing for federal and state offices is set for April 8 through April 10.“We are encouraging candidates to submit their Declarations of Candidacy and filing fees or petitions for candidacy by overnight delivery service,” said Election Board spokeswoman Misha Mohr.“However, we are working with safety and health officials to offer in-person candidate filing, as required by law, that meets CDC guidelines.Read more on NewsOK.com