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  1. Oklahoma Tax Commission

    24/7 online tax services. OTC in-person assistance! Got a Question?

  2. Internal Revenue Service | An official website of the United States ...

    Find IRS forms and answers to tax questions. We help you understand and meet your federal tax responsibilities.

  3. Taxes - USAGov

    Learn about filing federal income tax. Check the status of your tax refund, find help filing your taxes, and get federal tax forms.

  4. TurboTax® Official Site: File Taxes Online, Tax Filing Made Easy

    Match with a local tax expert as soon as January 6 who can do your taxes, start-to-finish. Get advice from tax experts as you file, as well as a final expert review. Just answer simple questions and we’ll …

    • Reviews: 324K
    • File Taxes Online with TaxAct

      Simple, step-by-step tax filing with tools along the way to maximize your refund. Fully credentialed tax help for personal & business taxes—unlike those other guys. 100% accurate business tax filing, plus …

    • FreeTaxUSA® - Free Online Tax Filing for Federal Returns

      Sep 25, 2025 · Your federal tax return and every supported federal form is 100% free. Whether you file a complex or simple federal return, we guarantee your federal return is always free.

    • Taxes | City of OKC

      Your sales tax helps pay for our core City services and things we need to keep our City going – employees, materials and supplies. That’s why it’s important that our sales tax dollars come to …

    • 2026 individual tax brackets, and tips for understanding what you pay ...

      Nov 25, 2025 · Use some key steps and the 2026 individual tax brackets to help you figure out your taxable income and get the most from possible credits and deductions.

    • Taxes Definition: Types, Who Pays, and Why - Investopedia

      Sep 10, 2025 · Taxes are a mandatory contribution levied on corporations or individuals to finance government activities and public services.

    • Pay Taxes - Oklahoma.gov

      If at least 90% of the tax liability is not paid by the original due date of the return, the unpaid tax becomes delinquent and a penalty of 5% shall be charged thereon.