Here’s the latest on tax deadlines for 2026.
United States: The 2026 federal tax filing season opens in late January and runs through the standard deadline of April 15, 2026 for individual returns, with some extensions or state-specific dates possible. Expect changes from 2025 tax reform measures affecting deductions and credits.[3][6]
UK and Great Britain: In England, the self-assessment deadline is typically January 31 for online submissions, with payments due by January 31 and the final deadline for paper returns earlier in the year. For 2026, HMRC guidance reiterates the same annual cycle, but always verify for any late-year extensions or changes to payment dates.[3]
Other jurisdictions (highlights): Several jurisdictions published mid-year notices about extended or restructured filing windows and new credit rules under 2025–2026 reform packages. If you’re a resident or filer outside the US/UK, check local tax authority releases for 2026 deadlines and any special relief programs.[4][3]
What this means for you in London:
Would you like me to pull specific due dates for your situation (e.g., UK self-assessment, international tax, or a particular country) and provide a concise checklist?[3]
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