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State contact information
If you have specific questions about what you can e-file or about rejections you received, contact the state for more information.
Oklahoma Tax Commission
P.O. Box 26890
Oklahoma City, OK 73126-0890
Email: efile@tax.ok.gov
Phone: 405-521-3637 or 405-522-5723 or 800-522-8165 ext. 13637
Tax Refund Inquiries: 405-521-3160 or 800-522-8165 ext. 13160
State electronic filing details
| Grace period | 10 days |
| E-filing mandate | Yes, if filing more than 10 returns |
| Accepts state-only filings | Yes |
| Return types accepted |
Resident Nonresident Part-year Estimate Payments Amended |
| Return types not accepted |
Extension |
| Accepts returns with these conditions |
Refund Zero balance Balance due |
| Direct deposit of refunds | Yes |
| Accepted forms of payment |
Direct debit (EFW) Electronic funds transfer (EFT) Credit card |
| Signature requirements | ERO retains signed Form 511-EF for 3 years. |
| Supports PDF attachments | Yes |
| Tax year(s) supported for e-filing | Current tax year and two prior tax years |
| Special considerations |
State contact information
If you have specific questions about what you can e-file or about rejections you received, contact the state for more information.
Oklahoma Tax Commission
Oklahoma City, OK 73194
Email: businessincometax@tax.ok.gov
Phone: 405-521-3126
State electronic filing details
| Grace period | None |
| E-filing mandate | Yes, Forms 512 and 512-S must be filed electronically |
| Accepts state-only filings | Yes |
| Return types accepted |
C Corporation S Coproration Consolidation/Combined Amended Short-year Estimated Payments (with return)
|
| Return types not accepted |
Extension Withholding |
| Direct deposit of refunds |
Yes, required |
| Accepted forms of payment |
Direct debit (EFW) Electronic funds transfer (EFT) Check by mail |
| Signature requirements | ERO retains signed Form EF |
| Supports PDF attachments | Yes |
| Tax year(s) supported for e-filing | Current tax year and two prior tax years |
| Special considerations |
State contact information
If you have specific questions about what you can e-file or about rejections you received, contact the state for more information.
Oklahoma Tax Commission
PO Box 269060
Oklahoma City, OK 73126-9060
Phone: 405-521-3637
State electronic filing details
| Grace period | None |
| E-filing mandate | Yes |
| Accepts state-only filings | Yes |
| Return types accepted |
Partnership Amended Short-year Composite (part of main return) |
| Return types not accepted |
Extension Estimate Payments Withholding |
| Direct deposit of refunds | Yes |
| Accepted forms of payment |
Direct debit (EFW) Electronic funds transfer (EFT) Credit card (Online Services section of website) Check by mail |
| Signature requirements | ERO retains signed Form EF for 3 years |
| Supports PDF attachments | Yes |
| Tax year(s) supported for e-filing | Current tax year and two prior tax years |
| Special considerations | Cannot e-file more than one original return for same tax year for the same FEIN, regardless of the fiscal year dates |
State contact information
If you have specific questions about what you can e-file or about rejections you received, contact the state for more information.
Oklahoma Tax Commission - Communications Division
Email: otcmaster@tax.ok.gov
Phone: (405) 521-3160
State electronic filing details
| Grace period | |
| E-Filing mandate | Yes |
| Accepts state-only filings | Yes |
| Return types accepted |
Resident Non-resident Amended Estimate payments |
| Return types not accepted |
Extension Withholding |
| Accepts return with these conditions |
Refund/credit (amended - no credit) Zero balance Balance due |
| Direct deposit of refunds | Yes |
| Accepted forms of payment |
Direct debit (EFW) Credit card via website (with fee) Electronic funds transfer (EFT) Check by mail |
| Signature requirements | Form EF, retained for three years. PIN allowed as signature |
| Supports PDF attachments | Yes |
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