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Tax Filing and other important Tax related deadlines
Individuals:
April 15, 2025: Deadline to file individual income tax returns (Form 1040) or to request an extension (Form 4868). If an extension is granted, the filing deadline moves to October 15, 2025.
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Businesses:
March 15, 2025: Deadline for S corporations (Form 1120S) and partnerships (Form 1065) to file their tax returns or request an extension.
April 15, 2025: Deadline for C corporations (Form 1120) operating on a calendar year to file their tax returns or request an extension.
September 15, 2025: Extended deadline for S corporations and partnerships that filed for an extension.
October 15, 2025: Extended deadline for C corporations that filed for an extension.
Estimated Tax Payments for Individuals and Corporations
April 15, 2025: First quarter estimated tax payment due.
June 15, 2025: Second quarter estimated tax payment due.
September 15, 2025: Third quarter estimated tax payment due.
January 15, 2026: Fourth quarter estimated tax payment due.