taxes

When Are State Tax Returns Due in Oklahoma?

Oklahoma is one of several states in which your state income tax return can be filed after April 15.

You probably already know that most Americans have to file their 2018 federal tax return by April 15, 2019 (as we told you earlier). For most states with an income tax (there are nine states with no income tax), the state return is also due on April 15 this year. However, some states give you more time to file — such as Oklahoma.

States With Tax Deadlines After April 15 in 2019

StateDue Date
DelawareApril 30
HawaiiApril 22
IowaApril 30
LouisianaMay 15
MaineApril 17
MassachusettsApril 17
New MexicoApril 30 (if e-filed)
OklahomaApril 22 (if e-filed)
VirginiaMay 1

If you want an extra week after the 2018 federal tax deadline to file Oklahoma Form 511, then e-file your state return. The due date for paper Oklahoma returns is April 15, 2019 (the same as the federal due date), but the deadline is shifted to April 22 if you file your return electronically.

Can't hit the deadline? Don't worry...the Sooner State will honor any federal filing extension if no Oklahoma tax is due. (You must attach a copy of the federal extension to your Oklahoma return.) If your federal return is not extended or Oklahoma tax is owed, a six-month state filing extension can still be requested using Form 504-I. Note, however, that 90% of your Oklahoma tax liability must be paid by the original due date to avoid penalties. Interest on any outstanding balance will be charged from the original due date of the return no matter what.

We recommend filing both federal and state returns at the same time if possible. State returns typically "piggyback" off the federal return, so it's usually easier to do them at the same time. There's also a better chance of avoiding discrepancies if you do them together. However, if that's not possible, having an extra week to file your Oklahoma return can help. It gives you more time to focus on getting your federal return off before the April 15 deadline and then to get your state return just right.

For information about other states with delayed tax filing deadlines, see 9 States Where You Can File Your State Tax Return After April 15.

Most Popular

Where's My Refund? How to Track Your Tax Refund Status
tax refunds

Where's My Refund? How to Track Your Tax Refund Status

If you're waiting for your tax refund, the IRS has an online tool that lets you track the status of your payment.
March 2, 2021
Where's My Stimulus Check? Use the IRS's "Get My Payment" Portal to Get an Answer
Coronavirus and Your Money

Where's My Stimulus Check? Use the IRS's "Get My Payment" Portal to Get an Answer

The IRS has an online tool that lets you track the status of your stimulus checks.
February 19, 2021
Your Guide to Roth Conversions
Special Report
Tax Breaks

Your Guide to Roth Conversions

A Kiplinger Special Report
February 25, 2021

Recommended

2021 Child Tax Credit Calculator
Tax Breaks

2021 Child Tax Credit Calculator

See how much money you would get in advance if President Biden's $3,000-per-child tax credit plan is enacted (it was just passed by the Senate).
March 6, 2021
Senate Passes $3,000 Child Tax Credit for 2021
Coronavirus and Your Money

Senate Passes $3,000 Child Tax Credit for 2021

The provision would temporarily increase the child tax credit to $3,000 or $3,600 per child for most families and have 50% of it paid in advance by th…
March 6, 2021
What's the Standard Deduction for 2020 vs. 2021?
Tax Breaks

What's the Standard Deduction for 2020 vs. 2021?

If you're like most Americans, taking the standard deduction on your tax return is better than claiming itemized deductions.
March 5, 2021
Claim These "Above-the-Line" Deductions on Your Tax Return (Even If You Don't Itemize)
Tax Breaks

Claim These "Above-the-Line" Deductions on Your Tax Return (Even If You Don't Itemize)

If, like most people, you claim the standard deduction instead of itemized deductions on your return, there are still many other tax deductions availa…
March 5, 2021