US federal tax authority guidance
Tax Calendar
Published by Internal Revenue Service.
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What this source supports
The IRS Tax Calendar lists current US federal filing and payment dates by quarter.
- Locator
- Tax Calendar introduction and First through Fourth Quarter links, accessed 26 September 2026.
- Editorial note
- The calendar does not establish which obligations apply or calculate an amount. Other jurisdictions need their own authority.
Related advice
Where this source is used
Source handling
Link and citation record
US federal guidance linked and paraphrased. A qualified professional must confirm applicability, amounts, payment methods, and dates.