90-Day Letter

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90-Day Letter

A letter that the IRS sends to a taxpayer after an audit. The letter states that the audit has found inconsistencies or other errors in the tax returns and that the taxpayer will have to pay more unless he/she can show that the audit is in error. The letter derives its name from the fact that the taxpayer has 90 days to dispute the results of the audit before reassessment occurs.
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This 90 day letter outlines the reason for assessment and quantifies the tax liability, including interest and penalties.
If a resolution of the matter cannot be reached in the appeals process, the IRS will likely forward a 90 day letter, also known as a Notice of Deficiency.