Letter 2030: What It Means and How to Respond

What the notice actually says

Letter 2030 tells a corporation or an estate/trust that income, deductions, or payments reported on its Form 1120 or Form 1041 don't match information the IRS received from third parties — banks, payers, other businesses — and proposes an adjustment to tax as a result. It is not simply CP2000 relabeled for a business return: the accuracy-penalty threshold, the response form, and the follow-up deficiency notice all differ from the individual notice, detailed below. The IRS's own Letter 2030 explainer states the notice's scope directly: it covers Form 1120 and Form 1041 filers, not partnerships (Form 1065) or S corporations (Form 1120-S), which fall outside this particular matching program. (For how Letter 2030 fits among the other notices, see the IRS Notice Library.)

The letter is addressed by Employer Identification Number rather than Social Security number, and its response form asks for a corporate-officer or fiduciary signature and title — details that make sense once you see it is built for an entity return, not an individual one. It also cites the corporate-specific accuracy-related penalty threshold under IRC §6662(d)(1)(B): for a corporation other than an S corporation or personal holding company, an understatement is "substantial" when it exceeds the lesser of 10% of the tax required to be shown on the return (or, if greater, $10,000) or $10,000,000 — a materially different threshold from the individual accuracy-penalty rule.

Even the signature line reflects the entity distinction. Where CP2000's response form asks the individual filer to sign for themselves, Letter 2030's response form — Form 15113 — asks whoever signs to identify their title within the corporation or their role as fiduciary, since the IRS needs to confirm the person responding actually has authority to bind the entity to the agreement or the disagreement. A response signed by someone without that authority can slow the case down even when the substance of the reply is otherwise correct.

What actually triggered it

Letter 2030 comes from the IRS's BMF Underreporter (BUR) program — the business-return counterpart to the individual Automated Underreporter (AUR) program that produces CP2000. It runs under a different part of the Internal Revenue Manual entirely: IRM 4.119.4, not IRM 4.19.3. The underlying mechanism is the same idea — electronic matching of information returns against the filed return — applied to Form 1120 and Form 1041 accounts rather than Form 1040 accounts.

A mismatch survives internal review and generates Letter 2030 the same way a CP2000 gets generated for an individual: an unreported payment, a deduction that does not reconcile against a payer's reporting, or a credit the matched data does not support.

The entity distinction matters here too, not just at the penalty-threshold level. Because BUR matches at the entity level rather than at the individual owner level, a genuinely pass-through mismatch — say, a 1099 issued to a partnership that a partner already picked up correctly on their own return — does not generate a Letter 2030 at all, since Form 1065 sits outside BUR's matching scope in the first place. A practitioner who sees a Letter 2030 should start from the assumption that the entity itself, not a partner or shareholder, is the party the IRS believes owes the adjustment.

Response deadline and what happens if you miss it

The notice states its own deadline — read that date directly off the letter itself rather than assuming a standard number of days, since the IRS does not publish one fixed day count that applies to every Letter 2030. If the entity does not respond by that date, or the IRS does not accept its explanation, the IRS proceeds to issue a formal Statutory Notice of Deficiency. For a business/entity account, that notice is called Letter 3219-B rather than CP3219A, but the consequence is the same: a fixed 90-day window (150 days if the entity's address is outside the United States) to petition the U.S. Tax Court, under the same IRC §6213(a) that governs the individual deficiency process.

As with the individual track, Letter 2030 is the last point where the entity can resolve a disagreement administratively without going to Tax Court. That makes it worth engaging with directly — a written response, even a late one requesting more time, keeps the case in a stage that still allows negotiation, where a Letter 3219-B does not.

The practitioner's actual next step

Confirm first that the return in question is actually a Form 1120 or Form 1041 filer — a partnership or S corporation client receiving what looks like a similar mismatch notice is more likely looking at an individual-level issue flowing through to a partner or shareholder's own CP2000, not a Letter 2030 in its own right. From there, pull the entity's books and the actual third-party information returns at issue, not just the return as filed, and confirm what the IRS actually has on record.

Respond on Form 15113 by the letter's stated deadline: agree and pay, or disagree with a signed statement and documentation attached, signed by an authorized corporate officer or fiduciary. On disagreement, if the case is not resolved and a Letter 3219-B follows, Appeals review is available on the same terms as the individual track — Form 12203, Request for Appeals Review, for a proposed adjustment of $25,000 or less, and a written protest for anything larger. Confirm the signer's authority before the response goes out, not after the IRS questions it.

What Letter 2030 gets confused with — and why the distinction matters

The most consequential confusion is treating Letter 2030 as simply CP2000 relabeled for a business return. It is not: the accuracy-penalty threshold under IRC §6662(d)(1)(B) is materially different from the individual rule, the response form is Form 15113 rather than the CP2000 response voucher, and the deficiency notice that follows non-resolution is Letter 3219-B, not CP3219A. A practitioner who assumes every CP2000 fact applies unchanged risks misapplying the wrong threshold or the wrong follow-up notice.

The second confusion runs the other direction: assuming Letter 2030 covers every business entity type. It does not. Partnerships and S corporations are pass-through entities with no entity-level tax liability in most cases, so a third-party mismatch on those returns generally surfaces as an individual CP2000 at the partner or shareholder level — not as a Letter 2030 to the entity itself. Confirm the entity type on the return before advising a client either way.

Common Questions