Note:
Internal Revenue Manual Part 25. Special Topics · 2026-10-03 edition · updated 2026-10-04 · United States
The indicator should be placed on all affected IDT tax years not identified by the taxpayer.
(3) Closing the case when TP B (invalid return not meeting nullity criteria) was assigned an IRSN,
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Adhere to the following:
Do not input a TC 971 AC 501/506 on an IRSN.
If you are resequencing an account, reestablish the SSN. Reinput the appropriate TC 971 AC 501/506 on the SSN.
If TC 971 AC 501/506 are placed on an IRSN entity, the transactions must be reversed with a TC 972 AC 501/506 using "IRSERR" as part of the MISC field. See IRM 25.23.2.6.2, Manually Reversing TC 971 AC 501, and IRM 25.23.2.6.4, Manually Reversing TC 971 AC 506, for additional information.
(4) Closing the case as IDT1/IDT3/IDT8,
The following incident numbers are present:
IR20150521512
IR20150521555
IR20150521556
IR20160127510
IR20160127513
IR20160614508
CR20170421067
LR20170421067
Determine if a tax administration code should be placed on the IDT victim’s account.
If a TC 971 AC 505 is present on the account, source "WI AM OTHER" must be used when inputting TC 971 AC 506 in addition to other required actions. Refer to IRM 25.23.2.10, Get Transcript Breach, IRM 25.23.2.11, Get an Electronic Filing PIN Incident, and IRM 25.23.2.13, Breach Numbers CR20170421067 and LR20170421067, for additional guidance.
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