Strategic Tax & Advisory Solutions Group

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Strategic Tax & Advisory Solutions Group

Strategic Tax & Advisory Solutions GroupStrategic Tax & Advisory Solutions GroupStrategic Tax & Advisory Solutions Group
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  • Tax Calculators & Tools
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  • Tax Guides & Strategies
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2026 tax deadlines

Staying on top of important tax deadlines can help you avoid unnecessary penalties, interest, and last-minute stress. Below are key federal tax deadlines for the 2026 tax filing season. Please note that tax deadlines may change, and this page will be updated annually. 


The information provided is for general informational purposes only and is subject to change based on IRS and state agency guidance. Please consult a tax professional regarding your specific situation.

Individual Tax Returns

Individual Tax Returns

Individual Tax Returns

 April 15, 2026

  • Deadline to file your 2025 individual federal income tax return (Form 1040)
  • Deadline to request an automatic filing extension
  • Deadline to make 2025 IRA and HSA contributions


June 15, 2026

  • Automatic extension deadline for U.S. citizens and resident aliens living and working abroad


October 15, 2026

  • Extended filing deadline for taxpayers who requested an extension

Estimated Tax Payments

Individual Tax Returns

Individual Tax Returns

April 15, 2026

  • 1st Quarter Payment Due


June 15, 2026

  • 2nd Quarter Payment Due
  • Deadline to make the required PTET prepayment for tax year 2026. 


September 15, 2026

  • 3rd Quarter Payment Due


January 15, 2027

  • 4th Quarter Payment Due


March 15, 2027

  • Remaining PTET balance due with the entity's California tax return.

Business Tax Deadlines

Individual Tax Returns

Business Tax Deadlines

February 2, 2026

  • Employers must provide Forms W-2 to employees
  • Deadline to issue and file Forms 1099-NEC


March 16, 2026

  • Partnership Returns (Form 1065)
  • S Corporation Returns (Form 1120-S)
  • Schedule K-1 distribution deadline


April 15, 2026

  • C Corporation Returns (Form 1120)
  • Deadline to request a corporate extension


June 15, 2026

  • Deadline to make the required PTET prepayment for tax year 2026. 


September 15, 2026

  • Extended deadline for Partnership and S Corporation returns


October 15, 2026

  • Extended deadline for C Corporation returns


March 15, 2027

  • Remaining PTET balance due with the entity's California tax return.

Don't Wait Until the Deadline

Meeting tax deadlines is important, but planning ahead can help reduce penalties, avoid surprises, and identify tax-saving opportunities before it's too late. 

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