2026 Tax Deadlines and Resources

Tax-related identity theft occurs when someone uses your stolen personal information, such as your Social Security number, to file a tax return claiming a fraudulent refund. Below, you will find useful information about tax-related identity theft, how to prevent it, and what to do if it happens to you. As we approach the 2026 tax deadlines, it's crucial to stay informed. If you would like more information about any of the topics listed below or need tax return help, please check the respective resources or contact our office.

- Identity Protection PIN Opt-In Program for Taxpayers

- IRS Identity Theft Victim Assistance: How It Works

- Identity Theft Resources for Taxpayers

- Taxpayer Guide to Identity Theft

IRS Form W-4, IRS Form W-9, and IRS Form SS-4 are essential documents for understanding your financial obligations, especially as we approach the 2026 tax deadlines. For those navigating business deductions, the Oregon Business Registry Website offers valuable resources. Additionally, if you're in need of tax return help or looking for identity theft resources, be sure to check out the Financial/Tax Calculators and Refund Status sections for more information.

January 15, 2026

4th Quarter 2024 Estimated Tax Payment Due

If you are self-employed or have other fourth-quarter income that requires you to pay quarterly estimated taxes, ensure to get them postmarked by the January 15, 2026 tax deadline.

March 16, 2026

Form 1120-S and Form 1065 Due

Form 1120-S and Form 1065 Extensions Due

April 15, 2026

Individual Tax Returns Due

The due date for filing individual tax returns and making tax payments is April 15, 2026. If you haven't applied for an extension, make sure to e-file or postmark your tax return by midnight. Additionally, don’t forget to check available identity theft resources that can help protect your information during this process. 

Individual Tax Return Extension Form Due

Form 1120 Due

Form 1120 Extension Due

1st Quarter Estimated Tax Payment Due

If you are self-employed or have other first-quarter income that requires you to pay quarterly estimated taxes, be certain to postmark your Form 1040-ES by this date. 

Last Day to Make an IRA Contribution for the Prior Tax Year

If you haven't already contributed to your retirement account for the prior year, be sure to do so by April 15, 2026. This is the final deadline for making contributions to a traditional IRA, whether deductible or not, and to a Roth IRA. If you have a Keogh or SEP and you received a filing extension, you can wait until October 15, 2026, to add prior year money into those accounts.

June 15, 2026

2nd Quarter Estimated Tax Payment Due

If you are self-employed or have other second-quarter income that requires you to pay quarterly estimated taxes, remember to have your payment postmarked by this date.

September 15, 2026

3rd Quarter Estimated Tax Payment Due

If you are self-employed or have other third-quarter income that requires you to pay quarterly estimated taxes, ensure your third-quarter payment is postmarked by the September 15, 2026 tax deadline. Don't forget, all business returns are also due at this time.

October 15, 2026

Extended Individual Tax Returns Due

If you had a filing extension on your tax return, make sure you complete and postmark it by October 15, 2026. For any tax return help needed, consider reaching out to a professional.

January 15, 2027

4th Quarter Estimated Tax Payment Due

If you are self-employed or have other fourth-quarter income that requires you to pay quarterly estimated taxes, have them postmarked by the January 15, 2027 tax deadline.