Tax Filing Reminders – March 2021 – UPDATED

If you are not an OK or TX resident or business, April 15 is currently the due date for

  • First installment of 2021 estimated tax
  • 2020 gift tax return
  • 2020 calendar-year C corporation income tax returns
  • 2020 calendar-year fiduciary income tax returns
  • 2020 Forms 990-T for retirement plans and IRAs

If you are not an OK or TX resident or organization, May 17 is currently the due date for

  • 2020 Federal individual income tax returns
  • Forms 990 and 990-T for 2020 calendar-year exempt organizations
  • Making 2020 IRA contributions

For OK & TX residents and entities, June 15 is the due date for

  • First installment of 2021 estimated tax
  • 2020 Individual income tax returns and payments
  • Making 2020 IRA contributions and Oklahoma 529 plan contributions
  • 2020 gift tax return
  • 2020 calendar-year C corporation income tax returns and payments
  • 2020 calendar-year fiduciary income tax returns and payments
  • 2020 Forms 990-T and payments for retirement plans and IRAs
  • 2020 calendar-year S corporation income tax returns
  • 2020 calendar-year partnership returns
  • Calendar-year corporations to elect S corporation status for 2021
  • Forms 990 and 990-T for 2020 calendar-year exempt organizations

June 15 is also the due date for

  • Texas Franchise Tax Returns for all filers
  • Second installment of 2021 estimated tax