Page 2 holds the Oklahoma Individual Estimated Tax Declaration General Instructions.
Estates and farmers: not required to make estimated tax payments.
Composite return: do not use this form for estimated tax payments made on behalf of the nonresident partners electing to be included in the composite return.
Composite payments: the estimated tax payments must be made under the partnership's name and Federal Employer Identification Number using Form OW-8-ESC.
Due dates (Calendar year): 1st Quarter - April 15, 2nd Quarter - June 15, 3rd Quarter - September 15, 4th Quarter - January 15.
Checks: make checks payable to Oklahoma Tax Commission. Do NOT send cash.
Electronic: if you make your estimated tax payment electronically, do not mail this payment coupon.
| Question | Answer |
|---|---|
| Form Name | OW-8-ES |
| Form Length | 2 pages |
| Fillable? | Yes |
| Fillable fields | 35 |
| Avg. time to fill out | 6 min |
| Edition | Rev 6-2025 |
| Filing deadline | First installment by April 15th for calendar year taxpayers |
| Where to send | Mail the coupon, along with payment, to: Oklahoma Tax Commission PO Box 269027 Oklahoma City, OK 73126-9027 |
| Matches the agency's file | Yes, checked October 2, 2026 |
| Other names | OW-8-ES, OW8ES, Form OW-8-ES, OK OW-8-ES, Oklahoma estimated tax payments, Oklahoma Individual Estimated Tax |
| Official source | OW-8-ES (Rev 6-2025), |
Form Ow 8 Es Oklahoma isn’t the one you’re looking for?