Summary
When an IRS notice arrives, most ecommerce owners see a deadline and a dollar figure, not a path forward. The single most important judgement: a notice is a claim about specific line items, and the response is a cross-check — taking each statement in the notice, comparing it to the filed return, and mapping it to the books and supporting documents that show what actually happened. Work through the notice statement by statement, keep the notice and any response for the records, and treat the notice's own due date as the only deadline that matters. If a statement does not tie out, that becomes an open item to resolve before responding, not a reason to assume the IRS made an error.
When an IRS notice arrives, most ecommerce owners see a deadline and a dollar figure, not a path forward. The single most important judgement: a notice is a claim about specific line items, and the response is a cross-check — taking each statement in the notice, comparing it to the filed return, and mapping it to the books and supporting documents that show what actually happened. Work through the notice statement by statement, keep the notice and any response for the records, and treat the notice's own due date as the only deadline that matters. If a statement does not tie out, that becomes an open item to resolve before responding, not a reason to assume the IRS made an error.
An IRS notice is a claim about the return, not a verdict
The IRS's own guidance, in Understanding your IRS notice or letter, is clear on the first step: review the notice carefully, keep it with the taxpayer's records, and act by the due date if a response is requested. For an ecommerce business, the return is built from marketplace sales, fees, refunds, inventory and the rest, so the notice is in effect claiming that some part of that return does not match what the IRS has on file.
That framing changes how an owner should read the notice. The reaction "the IRS is wrong" is less useful than "which line item is the IRS correcting, and what does the return say about it?" The IRS guidance says that when it has changed or corrected a return, the taxpayer should compare the notice information with the return. If the taxpayer agrees, the corrections get noted on their copy and kept for the records. So the first response is not a letter — it is a comparison exercise.
Where the evidence lives: books plus supporting documents
The response hinges on evidence, and the evidence standard is not mysterious. IRS Publication 583, Starting a Business and Keeping Records, says purchases, sales, payroll and other business transactions each generate supporting documents — sales slips, paid bills, invoices, receipts, deposit slips and canceled checks are named examples. Those documents support the entries in the books and the tax return.
The same publication describes what a recordkeeping system should contain: a summary of business transactions, ordinarily in journals and ledgers, plus the supporting documents. The system must clearly show income and expenses. For an ecommerce operator, that means the ledger entries for marketplace revenue, refunds, platform fees and cost of goods sold are the summary, and the settlement reports, supplier invoices, payment records and bank deposit slips are the supporting documents. Every statement on a notice should be traceable to one side of that pairing: a ledger entry, a supporting document, or both.
Work the notice statement by statement, not as a single challenge
A notice often contains several corrections or adjustments. Treating it as one dispute to "fight" is a common mistake. The IRS guidance says to dispute a notice by following the notice instructions, including information and copies of documents for review, and replying by the due date to guarantee appeal rights. That means each statement that the taxpayer disagrees with needs its own evidence, and the evidence needs to be organised so a reviewer can follow it.
The practical checklist runs like this. First, read the notice in full and mark the due date. Second, pull the filed return and compare the notice's figures against it, line by line. Third, for each line where the IRS figure and the return figure match, note the agreement and keep the notice with the return. Fourth, for each line where they do not match, trace the return figure down into the journals and ledgers, then from the ledgers to the supporting documents named in Publication 583. Where a document exists but the figures still do not tie out, that is an open item — a discrepancy to resolve before responding, not something to hide inside a general objection.
How a specialist team takes a notice apart
An experienced ecommerce finance team does not start writing a response letter on day one. It starts by classifying each statement on the notice against three layers: the filed return, the journals and ledgers, and the available supporting documents. The goal is not to argue the whole notice but to know, for every single item, which of three categories it falls into — the IRS figure agrees with the return, the IRS figure differs but the books and documents support the return, or the IRS figure differs and the books or documents are missing or inconsistent.
That third category is where the real work happens. A professional team will list those open items and chase the missing evidence before anyone drafts a response, because a response supported by documents is built on the ledger entries and the named supporting documents that already exist in the business. The output is not a narrative; it is an index that maps each notice item to the evidence that supports or contradicts it.
What Caigeek does with a notice
Caigeek handles this as a structured workflow, not as a generic "talk to the IRS" service. It takes in the notice, the filed return, and the business's books — journals and ledgers — along with whatever supporting documents exist, such as invoices, receipts, sales slips and deposit slips of the kind Publication 583 names.
Caigeek then classifies each statement on the notice against the filed return and maps it to the corresponding ledger entries and supporting documents. The deliverable is an evidence index, showing which notice statements tie out to books and documents and which do not, plus an open-item list of the statements where evidence is missing or figures do not reconcile. This is Caigeek's workflow, not an IRS requirement or a guaranteed resolution. It gives the owner a complete picture of what the notice actually claims and what evidence stands behind each claim, before any decision is made about responding.
What to do first this week
Pull the notice out of the stack. Read it once completely and put the due date on a calendar — that is the only deadline that matters. Then pull the filed return for the period the notice references, and the ledgers and supporting documents the business already keeps. You do not need to resolve anything this week; you need to get the three layers side by side so the statement-by-statement comparison can start. When the evidence is organised, deciding how to respond becomes a factual question rather than a stressful one.
Frequently asked questions
What should I do immediately when an IRS notice arrives?
Review the notice carefully, keep it for your records, and note the due date. If a response is requested, act by that date. Then pull the filed return it references so you can compare the notice's information against it.
What counts as evidence to support the return's figures?
IRS Publication 583 names the supporting documents that back up entries in the books: sales slips, paid bills, invoices, receipts, deposit slips and canceled checks. Those documents, alongside the journal and ledger summaries, show income and expenses.
How does Caigeek structure a response to a notice?
Caigeek classifies each statement on the notice against the filed return, then maps it to the ledger entries and available supporting documents. It delivers an evidence index plus an open-item list, so every claim on the notice is accounted for before a response is drafted.
Sources
- IRS, Understanding your IRS notice or letter — https://www.irs.gov/individuals/understanding-your-irs-notice-or-letter
- IRS Publication 583, Starting a Business and Keeping Records — https://www.irs.gov/publications/p583