Estimated Payment Vouchers (Form OW-8-ES)
Form OW-8-ES, Oklahoma Individual Estimated Tax Declaration, is used by individuals who need to make quarterly estimated tax payments to Oklahoma during the coming year.
Generally, you should make estimated tax payments if:
- You expect your Oklahoma tax liability to exceed your withholding by $500 or more, and
- Your withholding is expected to be less than the smaller of:
- 70% of your current year's tax liability, or
- 100% of your prior year's tax liability.
For calendar-year taxpayers, estimated tax payments are generally due quarterly throughout the year. The first payment is due on April 15, with later installments due according to the schedule shown on the vouchers.
Taxpayers whose income is earned unevenly throughout the year may be able to use the annualized income installment method (Form OW-8-P-SUP-I) to reduce or eliminate an underpayment charge. This commonly applies to seasonal businesses and taxpayers with fluctuating income.
Underpayment of Estimated Tax (Form OW-8-P)
Form OW-8-P, Underpayment of Estimated Tax Worksheet, is used to determine whether a taxpayer owes interest for failing to make sufficient estimated tax payments during the year.
You may need to complete Form OW-8-P if:
- Your Oklahoma tax liability exceeds withholding and payments made during the year, and
- You did not pay enough tax through withholding or estimated tax payments.
Injured Spouse Claim and Allocation (Form 505)
Form 505, Injured Spouse Claim and Allocation, allows one spouse to claim their portion of a joint refund when the refund is applied to the other spouse's Oklahoma Tax Commission debt.
An injured spouse is a taxpayer who:
- Filed a joint return,
- Is not responsible for the debt being collected,
- Reported income on the joint return, and
- Had Oklahoma withholding, estimated tax payments, or refundable credits contributing to the refund.
Form 505 is filed after the taxpayer has been notified that the joint refund will be applied to the other spouse's Oklahoma Tax Commission liability.
Note:
- The Injured Spouse form will not be submitted if you file your return electronically. You will need to mail the form to the appropriate address listed on the form/instructions.
- Copies of federal returns, W-2s, and any Forms 1099-R showing withholding should be included when filing the claim.
Oklahoma Extension Form 504-I
Form 504-I, Application for Extension of Time to File an Oklahoma Income Tax Return, is used to request additional time to file an Oklahoma individual income tax return. The extension provides additional time to file the return. It does not provide additional time to pay tax owed. Generally, Oklahoma honors a federal extension when no additional Oklahoma tax is due. A taxpayer may need Form 504-I when additional Oklahoma tax is owed or the taxpayer does not have a federal extension.
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