Identify the procedural position first
An owner may discover supplier invoices or customer reconciliations after an IRS examination has already produced an assessment. The useful question is whether those records justify a request to reconsider that assessment. Audit reconsideration is an administrative review process, not a promise to reopen every disagreement or an automatic replacement for a timely appeal.
The IRS describes reconsideration for an unpaid audit assessment or denied credits when relevant new information or a processing or computational error warrants another look. Start with the examination report and account history. Determine what tax remains unpaid, what adjustments were made, and whether a court decision or binding agreement already resolved the matter. These facts determine whether this route fits.
Explain the change with a worked file
Assume an examination disallowed $60,000 of Schedule C supplier costs because the owner did not provide records. The assessed additional tax remains unpaid. The owner later retrieves archived invoices, receiving reports, and bank records supporting $42,000 of actual deductible purchases. The remaining $18,000 consists of an unexplained transfer and a capital asset that requires a separate recovery analysis.
The reconsideration request should address the supported $42,000 adjustment specifically, explaining why those records were absent and how they tie to the examined year. It should not simply repeat the original $60,000 deduction. If a simplified recomputation reduces tax by $10,080 at an assumed 24% marginal income-tax rate, that is an illustration, not the final adjustment: self-employment tax, deduction interactions, interest, and penalties require their own recomputation.
Build an issue-by-issue submission
Prepare a schedule with the examiner's adjustment, the requested revision, each supporting document, and a concise explanation of the tax treatment. Identify what is new rather than submitting an undifferentiated bank-statement download. Reconcile purchase dates, payments, returns, personal charges, inventory treatment, and capitalization so the packet answers the reason for the original disallowance.
The IRS correspondence-examination guidance identifies a written explanation or Form 12661, along with supporting copies and the examination report when available. Follow the current submission instructions for the office handling the case. Keep originals, the complete submitted copy, upload or delivery confirmation, and a contact log. A document index helps both the reviewer and the owner locate a particular transaction without reconstructing the package months later.
For example, label each recovered invoice with a reference matching the purchase ledger and bank debit, then show the reconciliation total beside the examination adjustment. If several payments settled one invoice, explain the split. If an invoice covers several tax years, identify the allocation method and supporting delivery dates. These details make the new evidence usable rather than merely voluminous.
Keep collection and court calendars active
Publication 3598 explains that collection may be delayed during review, but an owner should not assume the request itself stops collection. Existing installment-agreement payments must continue. If the business faces immediate hardship, address that problem separately through the applicable collection or taxpayer-assistance process. The disputed assessment should remain visible in the cash plan until an actual adjustment posts.
Do not let reconsideration correspondence consume a statutory petition or refund deadline. A paid liability generally requires a formal refund-claim analysis instead, with its own filing and payment-lookback rules. Binding closing or compromise agreements and final court determinations can prevent reconsideration. Cases involving complex prior settlements or partnership proceedings require specific procedural review before choosing a submission route.
Control the follow-through
Assign responsibility for checking acknowledgments, requests for further information, and account changes. Keep current-year filing and payments moving while the older dispute is reviewed. When the IRS issues a decision, compare it with the requested adjustment and reconcile the resulting tax, penalty, interest, and payment balances rather than assuming a favorable letter cleared every item.
The practical goal is a complete factual explanation that lets the IRS evaluate a supported change. Reconsideration can reduce all, part, or none of an assessment. If the decision remains unfavorable, obtain advice about the available Appeals or refund routes and their deadlines. Retain the historical ledger and examination file because the resolution may also affect carryovers and later-year reporting.
Sources & further reading
Consult the original guidance and its effective dates. These references support the educational discussion; their application depends on the specific facts.