OR-20-INC: Form OR-20-INC, Oregon Corporation Income Tax Return (2025)
Oregon · Oregon DOR · Used for tax years 2025
Form OR-20-INC is the 2025 Oregon Corporation Income Tax Return. It reports a corporation’s taxable income, Oregon additions and subtractions, apportionment, income tax, and credits.
Who files this form
Use Form OR-20-INC when a corporation has Oregon-source income, but its income-producing activity does not constitute “doing business.”
If the corporation has an Oregon address, or has Oregon sales and one other Oregon apportionment factor, the form says to file Form OR-20 instead.
What you'll need
- Include a complete copy of the corporation’s federal Form 1120 and schedules.
- Have Schedule OR-AP available for the apportionment percentage and Oregon taxable income.
- Use the applicable sections of Schedule OR-ASC-CORP for additions, subtractions, and credits.
- Include a schedule for tax adjustments reported on line 9.
- For limited partner income only, include a copy of federal Schedule K-1, if applicable.
- Include Form OR-37 when reporting interest on underpayment of estimated tax on line 23.
- Have payment details ready for Schedule ES, including payer names, FEINs, payment dates, amounts, and payments made with an extension. Also gather amounts withheld on the corporation’s behalf from pass-through entity or real estate income.
How to file
Complete the return using UPPERCASE letters and blue or black ink. Print it at actual size (100%). Have the officer sign and date the return, and include a complete copy of federal Form 1120 and schedules.
Refund returns and returns with no tax due: Mail to:
Refund
PO Box 14777
Salem OR 97309-0960
Returns with tax to pay: Mail the return with payment to:
Oregon Department of Revenue
PO Box 14790
Salem OR 97309-0470
Do not include a payment voucher with the return. Do not submit photocopies of the Oregon form or use staples.
Common mistakes
- Using lowercase letters or ink other than blue or black. The form requires UPPERCASE letters and blue or black ink.
- Printing at a size other than 100%, submitting photocopies of the Oregon form, or using staples.
- Completing questions A through C unnecessarily. Complete them only for the corporation’s first return or if an answer changed during the tax year.
- Leaving extension payments out of line 17. The form specifically says to include them.
- Including a payment voucher with the return. The form says not to include one.
- Omitting the complete copy of federal Form 1120 and its schedules.
Questions people ask
Is there a minimum income tax on this form?
No. Line 16 states that there is no minimum income tax.
Where do I report payments made with an extension?
Report them on Schedule ES, line 6, with the date paid. Schedule ES, line 8, totals prepayments and refundable credits and carries to line 17 of the return.
Can I apply part of my refund to estimated tax?
Yes. Line 27 lets you enter the amount of your refund to credit to your open estimated tax account. Line 28 shows the remaining net refund.
Do I need to complete questions A through C every year?
No. Complete them only if this is the corporation’s first return or an answer changed during the tax year.
Can I authorize someone to discuss this return with the department?
Yes. The form has a checkbox to authorize the listed individual or individuals to receive and provide confidential tax information relating to the return.