Overview of IRS Notice CP518
The IRS Collection Procedure Notice 518 (CP518) is a notification that the IRS believes a taxpayer—either a business or an individual—has failed to file a required return, either as of the initial deadline for filing or as of any extension deadline. Pursuant to 26 U.S.C. § 6212 and Treasury Regulation § 301.6212-1, the IRS uses CP518 as one of various progressive notifications to taxpayers for tax assessment or collection process. See IRS Guidance for CP 518 Business and IRS Guidance for CP 518 Individual.
Last Known Mailing Address
Pursuant to Section 6212, if the IRS determines that there is a deficiency in respect of any federal income tax, including any excise tax authorized by Chapter 42 of the Internal Revenue Code, the IRS is authorized to send a notice of deficiency to the taxpayer by certified mail or registered mail. The CP518 notice must include a notice to the taxpayer of the taxpayer’s right to contact a local office of the taxpayer advocate and the location and phone number of the appropriate office.
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