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Key Extension Deadlines

Mark Your Calendar – Important Tax Filing & Extension Deadlines

Below are the important dates to file your taxes or request an extension. Ensure you meet the deadlines to avoid penalties.

Date Deadline Description Applicable Forms
March 15, 2025 Deadline for corporate tax returns or to request a 6-month extension. 1120, 1120A, 1120S, 7004
April 15, 2025 Deadline for individual tax returns or to request a 6-month extension. 1040, 1040A, 1040EZ, 4868
April 15, 2025 Deadline for estate & trust tax returns, partnership tax returns, or to request an extension. 1041, 1065, 7004
May 15, 2025 Deadline for non-profit organizations to file or request an extension. 990, 8868
September 16, 2025 Final deadline for corporate, trust, and partnership tax returns if an extension was filed. 1120, 1120A, 1120S, 1041, 1065
October 15, 2025 Final deadline to e-File individual tax returns with an approved extension. 1040, 1040A, 1040EZ