TC 341: Restricted Interest Abatement

What the code actually does

TC 341 is the manual abatement of interest. IRS Document 6209, Section 8A (the IRS’s reference guide to its data-processing codes) titles it “Restricted Interest Abatement” and states that it “abates a previously posted TC 190, 196, 340 or 336 in whole or in part,” then repeats the warning its assessment sibling carries: “after posting, interest cannot be assessed or abated by computer for the applicable Tax Module and assessed interest thereafter must be computed manually.” Like TC 340, it is a hand-built figure, and like TC 340 it can leave the module unable to keep its own interest current.

It is not simply the reversal of TC 340

The four codes named in that definition are the most useful thing on this page, because they break the assumption a practitioner naturally brings to a numbered pair. TC 341 reaches TC 340 (manual restricted interest), TC 196 (computer-generated interest assessed at notice or adjustment time), TC 336 (computer-generated interest on an examination deficiency), and TC 190 (manually computed interest). Two of those are systemic assessments. So a TC 341 sitting on a module with no TC 340 anywhere on it is not an anomaly and not evidence of an input error — it is the ordinary way a hand computation removes interest the computer had assessed. Reading the pair as strictly 340-in, 341-out will produce a false reconciliation error on a perfectly normal account, and, worse, will send a practitioner looking for a missing transaction that was never supposed to be there.

What cannot produce a TC 341

Interest relief does not work like penalty relief, and this is the single most common misconception a client brings to the conversation. IRM 20.2.1.4.1 disposes of it in one sentence, listed among the things employees must do to facilitate systemic computation: “never reducing or removing interest for reasonable cause. There is no provision in the law permitting interest to be adjusted for reasonable cause.” Illness, a destroyed office, reliance on a preparer, a hard year — every fact pattern that can support penalty relief under the reasonable-cause standard is simply outside the statute here. A TC 341 is produced by a computation being wrong, by a statutory suspension or restriction applying, or by an IRS delay that meets a specific abatement provision. It is never produced by sympathy, which means a request framed as a hardship narrative is not a weak request but a misdirected one.

Checking the amount

Because the figure is manual, verifying it means reproducing it, and IRM 20.2.5.6.2 sets out how the IRS itself is supposed to have done that. Any time interest is computed by hand, “it is necessary to recompute the entire tax module to ensure an accurate computation is made,” verifying every prior interest transaction on it — including the systemic ones. A partial check against the abated amount alone will not reveal the common failure mode, which is a wrong interest-to-date rather than a wrong rate. The same subsection requires the employee to “provide the reason on the adjustment source document when interest is abated,” so the rationale for a TC 341 is a document that exists and can be requested, not something to be reverse-engineered from the number.

One practical trap: the amount abated may be smaller than the client expects for a reason that has nothing to do with the merits. Interest continues to accrue on any remaining balance, and on a restricted module those accruals arrive only when someone inputs them. A client who sees a TC 341 and concludes the interest question is closed may be looking at a module that has simply stopped reporting.

What people mistake TC 341 for

People confuse TC 341 with TC 342, because both look like ways of undoing a restriction. They do different jobs. TC 341 moves money — it is a credit transaction that reduces assessed interest, and it does not lift a restriction already on the module. Doc 6209’s TC 340 entry adds one exception: when the IRS enters a TC 340 or TC 341 together with an interest computation amount (the balance the computer should resume from), the computer keeps accruing interest. TC 342 moves no money at all; it exists solely to switch systemic interest computation back on, and Doc 6209 records that it “can only be input for 0 amount.” A practitioner who wants a restricted account computing normally again needs a TC 342, a non-restricting TC 340 (a TC 340 the IRS enters so the computer resumes interest), or a TC 341 the IRS enters with an interest computation amount; an ordinary TC 341 will not deliver it however large the abatement.

Practitioners also confuse it with TC 337, which abates the same overlapping set of interest assessments — 190, 196 and 336 — but the system generates it when an examination adjustment posts. The distinction is authorship, not amount: a TC 337 is the system unwinding exam interest on its own, while a TC 341 is a person deciding what the interest should have been. Only one of the two has a workpaper behind it.

What to do next

Identify which assessment the TC 341 actually abated before treating it as a TC 340 reversal — with four candidate codes, the pairing is a question rather than a given.

Ask for the source-document reason. The IRM requires the IRS to record it, and it will usually reveal whether the abatement rested on a statutory suspension, a computation correction, or an IRS delay provision.

Do not build the request around reasonable cause if a further abatement is being sought. There is no such provision for interest. The usual grounds are a wrong computation or date, and two statutory ones. IRC §6404(e) lets the IRS abate deficiency interest that accrued because an IRS employee made an unreasonable error or delay in a ministerial or managerial act. It covers only interest that accrued after the IRS first contacted the taxpayer in writing about the deficiency. IRC §6404(g) suspends interest on added tax when an individual filed on time and the IRS sent no notice of the added liability within 36 months after the later of the filing date or the due date. It does not suspend interest on tax the return itself showed.

Recompute the whole module rather than the abated line, since the IRM requires the IRS to do the same and the usual error is in the dates rather than the arithmetic.

Confirm whether accruals resumed, and decode the surrounding transactions with the IRS Transcript Decoder before quoting a client any figure as final.