Corporations deposit the fourth installment of estimated tax for 2026.

Non-farm employers file Form 941 for the third quarter to report wages paid, and social security, Medicare, and income tax withheld from wages, and compute employer matching social security payments

Individuals file a 2025 income tax return (Form 1040) if an automatic extension was requested

Corporations file a 2025 calendar year tax return (Form 1120) if you requested an automatic extension

Third quarter estimate is due for 2026 for individuals that pay estimated taxes

S Corporations file a 2025 calendar year income tax return (Form 1120S) if you requested an automatic extension

Partnerships file a 2025 calendar year income tax return (Form 1065) if you requested an automatic extension

Corporations deposit third installment of estimated tax for 2026

Non-farm employers file Form 941 for the second quarter to report Social Security, Medicare, and withholding.

Form 5500 is due for all employers that maintain an employee benefit plan such as a pension plan. If not able to file, file form 5588 to request an automatic two and a half-month extension.

Second quarter estimate is due for 2026 for individuals that pay estimated taxes.

Corporations deposit the second installment of estimated income tax for 2026.

Non-farm employers file Form 941 for the first quarter to report Social Security, Medicare, and withholding.

Individuals file a 2025 income tax return (Form 1040) and pay any tax due. If not able to file, file Form 4868 to request an automatic six-month extension. Any tax due must be paid with the extension.

First quarter estimate is due for 2026 for individuals paying estimated taxes.

C Corporations file a 2025 calendar year tax return (Form 1120) and pay any tax due. If not able to file, file Form 7004 to request an automatic six-month extension. Any tax due must be paid with the extension.

C Corporations deposit the first installment of estimated income tax for 2026.

Last Day to report a loss claim to your Specialist.

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