Notice of Deficiency

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90-Day Letter IRS Audit Tax Deficiency U.S. Tax Court Tax Assessment Tax Dispute Notice of Deficiency Income Tax

A formal notice issued by the IRS after an audit indicating that a proposed deficiency will be assessed unless the taxpayer files a petition with the U.S. Tax Court within a specified time.

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Definitions

Notice of Deficiency

Notice of Deficiency IRS Tax Taxpayer Last Known Address Tax Deficiency Tax Computation

A Notice of Deficiency is a formal notice issued by the Internal Revenue Service (IRS) to a taxpayer, outlining the amount of additional tax owed and a summary of how the deficiency was calculated. This notice must be sent to the taxpayer's last known address to be legally valid.