New York Notice of Determination: The 90-Day Clock, BCMS vs. DTA, and What to Do Now
By Alex Tsatskin, Esq. | New York Sales Tax Defense
If you just received a Notice of Determination from the New York State Department of Taxation and Finance, your first instinct might be to set it aside, call your accountant, or wait to see if the number is negotiable.
You do not have as much time as you think.
The 90-day window to challenge a Notice of Determination runs from the date DTF mailed it. If that envelope sat on your desk for a week before you looked at it, those days are already gone. The clock does not reset when you open the letter.
The good news: you still have real options. Which one you choose, and how fast you move, will determine everything that follows.
What Is a Notice of Determination, and What Does It Actually Mean?
A Notice of Determination (NOD) is DTF's formal assessment against your business. It is issued under New York Tax Law Section 1138 and arrives by certified or registered mail. When you receive one, DTF is telling you that they have completed their review and believe you owe additional tax, plus penalties and interest.
DTF is not a neutral party. The auditor's job is to assess additional tax, and the NOD is the output of that process. It is often based on block sampling, a methodology DTF uses regularly under DTF Publication 132, where auditors select a representative period, calculate an error rate, and extrapolate across the full audit window. That extrapolation can significantly overstate your actual liability, and it is challengeable.
The NOD is not final. Not yet. But it becomes final if you let the deadline pass.
How Long Do You Have to Respond, and When Did the Clock Start?
Under 20 NYCRR 535.5(a)(1), you have 90 days from DTF's mailing date to either file a request with the Bureau of Conciliation and Mediation Services (BCMS) or file a petition with the Division of Tax Appeals (DTA). That deadline begins on the date printed on the notice, not the date you received it.
If you are reading this post right after opening the envelope, check the date on the notice itself. That date is close to Day One. Whatever days have passed since then have already been counted.
Missing the 90-day deadline converts the NOD into a final, uncontestable assessment. DTF can then move to collect. There is no late-filing exception for not realizing the clock was running.
The window is closing. If you have received a Notice of Determination and have not yet taken action, contact Sales Tax Legal now.
What Are Your Two Options, and How Do You Choose Between Them?
Once you decide to fight the assessment, you have two paths. This is a decision, not a sequence.
Option 1: BCMS (Bureau of Conciliation and Mediation Services)
BCMS is DTF's internal administrative dispute resolution process. You request a conciliation conference, a BCMS conciliator reviews the matter, and the process results in a conciliation order. More than 98% of protests go through BCMS, and over 90% are resolved there without escalating to formal litigation.
Filing a BCMS request suspends your 90-day DTA petition clock. If BCMS does not resolve the matter in your favor, you are not bound by the conciliation order. You can escalate to DTA within 90 days of receiving it. To request a BCMS conference, you file Form CMS-1-MN by fax to 518-435-8554.
BCMS makes sense in most cases. It is faster, cheaper, and preserves your options. Meaningful reductions have been achieved at the BCMS stage in New York sales tax cases, before any formal litigation becomes necessary. The BCMS conciliator is not the auditor. They have more authority to resolve grey areas and acknowledge methodology problems.
Option 2: DTA (Division of Tax Appeals)
The DTA is an independent administrative tribunal, not part of DTF. Under 20 NYCRR 535.5(a)(1)(ii), you can file a petition there directly, bypassing BCMS entirely. The DTA has a Small Claims Unit under Tax Law Section 2010 for disputes under $40,000, with an expedited, informal process. Larger disputes go to a formal ALJ hearing with full evidentiary procedures.
Going directly to DTA makes sense in certain situations: where the legal issue is clean and the hearing record is already well-documented, where the dispute is substantial enough to warrant formal proceedings from the start, or where there is a specific legal challenge that benefits from an independent tribunal rather than an internal DTF review. The choice depends on your facts, the nature of the dispute, and your goals. There is no default right answer.
If you are trying to figure out which path fits your situation, that is exactly the conversation to have with a New York sales tax attorney before you file anything.
Why Does the Assessment Amount Often Seem Disconnected from Reality?
Because it frequently is. DTF builds its assessments on estimates, projections, and assumptions. Each one can be challenged.
There are three broad ways to fight back, and a strong defense often uses more than one.
- The documents. DTF treats any sale without documentation as taxable. Resale certificates, exemption certificates, proof of out-of-state delivery, and records showing tax was already paid at purchase can eliminate significant portions of the proposed assessment. Document recovery is often the highest-value first step.
- The law. Not everything DTF assessed is actually taxable. New York's taxability rules are specific, and auditors make mistakes. Services, certain goods, and transactions with exempt customers are commonly mischaracterized. If the audit included transactions that are legally not subject to tax, that is a legal argument, not just a factual one.
- The methodology. This is where block sampling comes in. Under DTF Publication 132, auditors select a representative period, calculate an error rate, and extrapolate that rate across the full audit period. If the test period was not representative, if the population was defined incorrectly, or if the extrapolation methodology had errors, the entire projected assessment can be challenged. Sample period challenges are technical and require someone who knows how DTF builds its models.
The assessment on the NOD is DTF's opening position. It is built on their assumptions. Your job, with counsel, is to take those assumptions apart.
Can the State Hold You Personally Responsible, Not Just Your Business?
Yes. New York Tax Law Section 1133(a) imposes personal liability on “every person required to collect any tax.” Section 1131(1) defines “person required to collect” to include officers, directors, employees, managers, and partners who had a duty to collect and remit sales tax and failed to do so.
Personal liability is not theoretical. It survives a business closure, a bankruptcy, or a corporate dissolution. DTF can and does pursue individuals for the business's unpaid sales tax obligations. The shield of the corporate entity does not protect you when it comes to sales tax.
If you received a personal NOD, or if you are an officer or manager of a business that received an NOD and you are concerned about personal exposure, that is a separate analysis that needs to happen quickly and in parallel with any business-level response.
What Should You Do Right Now?
Find the notice. Note the mailing date printed on it. Calculate your remaining days. Do not wait to see if the number is negotiable.
Do not contact DTF directly before speaking with counsel. What you say, what you produce, and the positions you stake out before you understand the full record travel forward through every stage of the process. Statements made directly to DTF without representation can narrow your options and strengthen DTF's position.
Penalties on the assessment are already accruing under Tax Law Section 1145. They compound on top of the base tax, and DTF sets interest rates quarterly. Reasonable cause abatement is available under Tax Law Section 1145(a)(1)(B), but it requires specific documentation and legal argument. It does not happen automatically.
The assessment on your desk is not final. Whether it stays that way depends on what you do before the 90 days run out, and those 90 days started the day DTF mailed that notice.
The first call costs you nothing. Missing the deadline costs you everything.
Sales Tax Legal handles New York sales tax audits, assessments, BCMS proceedings, and DTA appeals. If you have received a Notice of Determination, contact us now.
Frequently Asked Questions
What is a Notice of Determination in New York?
A Notice of Determination is DTF's formal written assessment stating the amount of tax, penalty, and interest DTF believes you owe. It is issued under Tax Law Section 1138, sent by certified or registered mail, and starts the 90-day clock to challenge the assessment.
When does the 90-day appeal deadline start in New York?
The 90-day clock starts on the date DTF mailed the Notice of Determination, not the date you received it or opened it. Under 20 NYCRR 535.5(a)(1), days that passed between the mailing date and when you opened the envelope have already been counted against your deadline.
What happens if I miss the 90-day deadline to appeal a New York sales tax assessment?
The assessment becomes final. Once final, DTF can move to collect the full amount through levies, liens, and other enforcement actions. There is no standard exception for failing to recognize the deadline was running.
What is BCMS, and should I use it instead of going directly to the DTA?
BCMS (Bureau of Conciliation and Mediation Services) is DTF's internal dispute resolution process. More than 98% of protests go through BCMS, and over 90% are resolved there. Filing a BCMS request suspends your 90-day DTA petition clock, and if BCMS does not resolve the matter, you can escalate to DTA within 90 days of receiving the conciliation order.
Can DTF come after me personally for my business's sales tax debt?
Yes. Under Tax Law Section 1133(a), personal liability attaches to any person required to collect the tax, a category defined in Section 1131(1) to include officers, directors, managers, partners, and employees with tax collection responsibilities. Personal liability survives a business closure, bankruptcy, or corporate dissolution.
What if the assessment is based on an audit that sampled the wrong period?
Challenge it. Block sampling is a standard DTF audit methodology under DTF Publication 132, but the sample period selection, population definition, and extrapolation method are all challengeable. An assessment based on a non-representative test period can significantly overstate actual liability.
This article is for informational purposes only and does not constitute legal advice or create an attorney-client relationship. Attorney advertising. Prior results do not guarantee a similar outcome.
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