Online Premium Tax for Insurance State Filing Deadlines Home State Filing Deadlines State Participation Frequently Asked Questions Login Participating States Select a month below to see filing deadlines for participating states. The deadlines for Oklahoma are available below this section. Select a Month - Any -JanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecember Oklahoma Regulated Entities Deadlines Learn More