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Usually March 15 for calendar year filers

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IRS penalty estimates using published IRS formulas.

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Disclaimer: This tool provides estimates only. Results may vary from actual IRS calculations. This is not legal, tax, or financial advice. We do not represent you before the IRS. Letter templates are starting points; you are responsible for reviewing and finalizing any documents. Consult a qualified tax professional for advice specific to your situation.

Circular 230: IRS Circular 230 Notice: To comply with IRS regulations, we advise you that any tax information contained in this website is not intended to be used, and cannot be used, for the purpose of (i) avoiding penalties under the Internal Revenue Code or (ii) promoting, marketing, or recommending any transaction or matter addressed herein.

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