Filing & deposit calendar — EA Part 2 Widgets

What this does

How to read it Visual: timeline rail of due dates — extensions don’t extend time to pay.

Pick an entity and see the big filing and deposit dates on a simple timeline for calendar-year 2025.

Visual: timeline rail of due dates — extensions don’t extend time to pay.

Pick entity / situation

Has employees (employment tax deposits)
Needs estimated taxes

Due-date timeline (calendar year)

Exam trap: Partnership and S corp returns are generally due the 15th day of the 3rd month (March 15 for calendar year). C corp generally 15th day of 4th month (April 15). Extensions don’t extend time to pay. Deposit schedules depend on lookback liability.

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Study tool only — not official IRS software. Figures labeled 2025 track law/forms through Dec 31, 2025. Confirm against current IRS pubs before the exam.