What is sales tax notice response?
The state letter answered with a reconciliation, not a phone call — and the voluntary-disclosure route explained when the exposure is historic.
A state sales tax notice almost never means what it sounds like on first read. A 'nexus questionnaire' is the state asking whether you should have registered and didn't; a 'non-filer notice' means the state's data-matching caught a return that never showed up; an 'assessment' is a number the state is proposing to bill you, whether or not it reflects what you actually owe. Every one of those letters comes from a different state Department of Revenue, in a different format, on a deadline the letter itself sets — commonly 30 days from the notice date, not from the day you open the envelope. There is no national sales tax notice process the way there's a single GST portal cycle in India; each state runs its own mail, its own portal, and its own escalation path, so the first job on any notice is reading it correctly before responding to it at all.
Underneath most notices sits the same root cause: nexus crossed a threshold — economic (commonly $100,000 in sales into a state, since South Dakota v. Wayfair in 2018) or physical (an office, an employee, inventory sitting in an Amazon FBA warehouse) — before a permit was filed for that state. The state's data-matching systems increasingly catch this on their own, cross-referencing marketplace 1099-K filings, franchise tax registrations and other states' data against who's actually registered for sales tax. A notice is the state telling you it found the gap; how far back the exposure runs, and what it's going to cost to close, are the two questions everything after the notice turns on.
Who does what
| Your CapEasy team | Sales tax notice response, the reconciliations and reporting behind it, and the questions list that keeps it honest. |
| Your CPA or enrolled agent | Everything that carries a licence in United States — rendered exactly as written: issue compilation, review or audit reports — those are restricted to licensed cpa firms. |
| You | One conversation with one named person, and the decisions that are genuinely yours. |
Sales tax notice response in United States
A VDA only works before the state has made contact — eligibility closes the moment a notice arrives
A Voluntary Disclosure Agreement requires the business not to have already been contacted by the state or placed under audit. The anonymous initial inquiry — filed with the state's voluntary disclosure unit by case code, not company name — has to go in while that condition still holds. Once a nexus questionnaire, non-filer notice or audit letter has actually landed, the VDA route for that state closes and whatever notice-response process the letter describes becomes the only path. Exposure gets flagged and a VDA inquiry gets started as soon as it's identified, precisely because that window doesn't reopen.
VDA look-back periods are capped, but the cap is negotiated per state — not a fixed national number
A standard VDA typically caps the look-back at three to four years instead of the full statute of limitations, which in some states runs considerably longer for a business that was never registered at all. The state's voluntary disclosure unit reviews the anonymous inquiry and offers terms — the look-back period, the penalty treatment, how interest is handled — before the business identifies itself and files the back returns for that negotiated window. Terms are set state by state; there is no multi-state VDA that settles every state's exposure in one filing, though the Multistate Tax Commission runs a joint program that gives several states a shared front door for the initial inquiry even though each state still negotiates its own terms separately.
Most notices carry a hard deadline — commonly 30 days from the notice date, not from when it's read
State notice-response deadlines run from the date printed on the letter, and 30 days is the common window across states that use one, though it isn't universal. Missing that window can convert a routine notice into an assessment with no further opportunity to supply the reconciliation that would have resolved it at the notice stage. The first step on any notice is confirming it's genuine — not a scam letter mimicking a state DOR — and identifying exactly which of the notice types it is, because a nexus questionnaire, a non-filer notice and an audit letter each call for a different response built from different records.
Preparing a notice response or a VDA is clerical work; a contested audit hearing is not
Preparing and submitting VDA paperwork, back returns and a routine notice response under a client power of attorney is unregulated clerical and advisory work in every state reviewed — no state requires a CPA, EA or attorney license to do it, and it's done using the business's own state DOR portal credentials. What changes the picture is a contested audit hearing, a formal administrative appeal, or giving positional legal advice on a disputed assessment: CPAs and EAs generally may represent taxpayers in administrative tax proceedings, but arguing a contested position, or the matter reaching a stage that calls for licensed legal representation, sits with a CPA, EA or US tax attorney — not with unlicensed preparation work, however thorough the reconciliation behind it is.
What your CPA or enrolled agent receives from us
- A read of the actual notice, translated: which state DOR sent it, what type it is (nexus questionnaire, non-filer notice, audit notice or assessment), and the exact response deadline printed on it.
- A sales-by-state and sales-by-jurisdiction reconciliation for the period(s) the notice references, matched against the states you're currently registered in.
- A nexus exposure memo — where physical or economic nexus exists but no permit was ever filed, with the dollar and time scope of the gap, before any state contact is made.
- For a VDA: the anonymous initial inquiry package (case-coded, not company-identified) ready to submit to the state's voluntary disclosure unit, plus the back-return workpapers for the negotiated look-back period once terms are offered.
- For a live notice: the drafted response with the sales records, resale/exemption certificates and nexus documentation the state actually asked for, ready to submit within its deadline.
- A record of resale and exemption certificates on file, matched to the exempt sales the notice or the reconciliation touches.
