The IRS Says You Owe $14,300

Published: August 10, 2026 · Reading time: 12 min

TL;DR: A statutory notice of deficiency — Letter 3219 after an exam, CP3219A after an unanswered CP2000 — forces one decision on a 90-day clock (§6213(a); 150 days if addressed outside the U.S.). The two paths differ on the variable you actually feel: do you pay before you argue? Tax Court is the only prepayment forum — petition within 90 days and assessment is barred while the case is pending, for a $60 filing fee. Miss it and the door does not reopen: Flora requires paying in full, §7422(a) requires an administrative refund claim first, and §6532(a) then makes you wait 6 months (or a disallowance) and sue within 2 years of a mailed disallowance. Under $50,000 per year you can elect the §7463 small tax case — informal, but §7463(b) says the decision "shall not be reviewed in any other court." And whichever you choose, interest runs from the original due date — a §6603 deposit stops it on the part you expect to lose, without conceding anything.

The corpus covers what a CP2000 is and how to survive a document request. Both name the 90-day letter and stop there, because both are about the stage before it.

This is the stage after. The notice has arrived, the examination is over, and you have one decision to make with a hard deadline attached to it.

What the notice actually is

A statutory notice of deficiency is the last document the IRS must issue before it can assess the tax. It is sometimes called a 90-day letter, and it comes in two common flavours:

§6213(a) does two things at once. It gives you 90 days from the date the notice is mailed to petition the Tax Court — 150 days if the notice is addressed to a person outside the United States, and Saturdays, Sundays and legal holidays in the District of Columbia do not count as the last day. And it bars the IRS from assessing the deficiency or beginning collection during that period, and while a petition is pending.

That second half is the whole game. It is the only point in the process where the burden of acting first is on the government.

The two paths

Read down the first column and the appeal of the Tax Court is obvious for anyone who cannot write a five-figure cheque on demand. Read down the second and you see what the price of waiting is: not the loss of the argument, but the requirement to fund it first.

Why "pay first" is a real rule and not a formality

Flora is the case that settled it: a refund suit requires full payment of the assessment, not a partial payment and not an instalment plan. And §7422(a) is unambiguous about the step before the courthouse:

No suit or proceeding shall be maintained in any court for the recovery of any internal revenue tax … until a claim for refund or credit has been duly filed with the Secretary.

For an individual that claim is normally a Form 1040-X, or Form 843 for certain penalties and additions. Then §6532(a)(1) imposes the wait:

• No suit before 6 months have passed from filing the claim, unless the IRS renders a decision within that time
• No suit after 2 years from the date the IRS mails a notice of disallowance by certified or registered mail
• The 2-year period can be extended only by written agreement

One useful subtlety: if the IRS simply never answers your claim, the 2-year clock never starts. You may sue any time after the six months are up, and the deadline only attaches once a disallowance is actually mailed.

The $14,300 example, both ways

Nadia, a freelance developer, gets a CP3219A proposing a $14,300 deficiency plus a 20% accuracy-related penalty of $2,860 — $17,160 before interest.

Path A — petition the Tax Court within 90 days

• Out of pocket today: $60
• Assessment and collection: barred while the case is pending
• Deficiency at stake for a single year: $14,300, which is under $50,000, so the small tax case election is available
• Interest continues to accrue on any amount she ultimately owes

Path B — let the 90 days lapse

• The $17,160 is assessed; collection begins
• To litigate she must now pay $17,160 plus accrued interest in full
• Then file a refund claim
• Then wait 6 months, or for a disallowance
• Then file suit — with a District Court filing fee and, realistically, counsel

Same dispute, same facts, same evidence. The only difference is a date, and the date changed the case from a $60 filing fee to a five-figure prepayment.

The small tax case: what $50,000 buys and what it costs

§7463(a) lets you elect small tax case procedures — with the Tax Court's concurrence — where neither the deficiency in dispute nor any claimed overpayment exceeds $50,000 for any one taxable year.

What you get:

• Informal proceedings, with relaxed rules of evidence
• Sessions held in more cities than regular cases
• A forum designed for taxpayers appearing without a lawyer

What you give up, in one sentence of §7463(b):

A decision entered in any case in which the proceedings are conducted under this section shall not be reviewed in any other court and shall not be treated as a precedent for any other case.

No appeal. Not if you lose, not if the court gets the law wrong, not if a circuit court has already decided the point your way.

How to choose:

Note also §7463(a)'s measurement: per taxable year. Three years at $30,000 each is not a $90,000 case for this purpose. And §7463(d) lets either side ask to discontinue the small case procedure before the decision becomes final, if the case turns out bigger than it looked.

The interest clock, and the deposit that stops it

Interest on an underpayment runs from the original due date of the return, all the way through the examination, the notice, and the litigation. A case that takes two years to resolve accrues two years of interest on whatever you end up owing.

§6603 is the tool almost nobody uses. It allows a cash deposit against a tax that has not yet been assessed, and §6603(b) provides that to the extent the deposit is later used to pay the tax, the tax is "treated as paid when the deposit is made."

The properties that make it useful:

• It is not a payment of tax, so it does not concede liability and does not moot your petition
• It stops the interest clock on the deposited amount from the deposit date
• It can generally be returned to you on request, except where collection is in jeopardy

The natural use for a freelancer: deposit the slice of the proposed deficiency you privately expect to lose, and litigate the rest with the interest exposure capped. You keep the argument and you stop the meter on the part of it you were never going to win.

If both doors are already closed

Say the 90 days lapsed, the tax was assessed, and paying it in full to sue is out of reach. There is still something between you and the collection process, and it is not a court:

• Audit reconsideration. An administrative reopening of an assessment where you have information the IRS never considered — typically because you never received the notices, or the records surfaced late. It is discretionary, not a right, but it costs a letter and it is the standard route for a substitute-for-return assessment or an unanswered exam
• Collection alternatives. An instalment agreement or another collection option does not dispute the liability, but it does stop the escalation while something else is being sorted out
• Penalty relief. The penalty and the tax are separate. Even where the tax is settled, reasonable cause or first-time abatement may still remove the accuracy or late-filing penalty layered on top
• The refund route, later. Paying the assessment does not extinguish the claim. §6511(a) allows a refund claim within 2 years from the time the tax was paid even when the three-year-from-filing window has closed — so a taxpayer who pays an old assessment gets a fresh two-year window measured from that payment

None of these is as good as the petition you did not file. All of them are better than nothing, which is what most people assume they have.

The thing that decides most of these cases

It is not the forum. It is whether the records exist.

A deficiency notice is the end of a process that began with someone asking you to substantiate something. The Cohan rule allows a court to estimate a deduction on incomplete evidence, but it does not apply to the categories §274(d) governs — travel, meals, gifts, and listed property — where the statute requires substantiation and estimation is unavailable. And §7491(a) only shifts the burden of proof to the IRS if you introduced credible evidence and complied with substantiation requirements and maintained all required records and cooperated.

Which means the outcome of the case you are choosing a forum for was largely determined by whether you kept receipts and a mileage log three years ago.

Frequently Asked Questions

What happens if I ignore a notice of deficiency?

The deficiency is assessed and collection begins. A statutory notice of deficiency, sent as Letter 3219 after an examination or CP3219A after an unanswered under-reporter notice, is the last document the IRS must send before it can assess. Section 6213(a) gives you 90 days from the date the notice is mailed — 150 if it is addressed to a person outside the United States — to file a petition with the Tax Court, and bars the IRS from assessing or collecting during that window and while a petition is pending. Let the 90 days run out and the bar lifts: the tax, penalties and interest are assessed and the collection process starts. You have not lost every remedy at that point, but you have lost the only one that lets you argue before paying. Everything afterwards requires paying the tax in full first, and the interest that has been accruing since the original due date of the return does not pause for any of it.

Do I have to pay the tax before I can dispute it?

Only if you are outside the Tax Court. The Tax Court is the one federal forum where you can litigate a deficiency without paying it first, which is why the overwhelming majority of tax cases are filed there. If you instead want a U.S. District Court or the Court of Federal Claims — the only forums where a jury is available, and then only in District Court — you must satisfy the full-payment rule from Flora v. United States, 362 U.S. 145 (1960): pay the assessed tax in full, file an administrative claim for refund, and only then sue. Section 7422(a) is the statutory hook, and it is absolute — no suit for the recovery of any internal revenue tax may be maintained in any court until a claim for refund or credit has been duly filed. So the sequence is pay, claim, wait, sue, and the waiting is not rhetorical: section 6532(a) forbids filing suit until six months have passed from the claim, unless the IRS disallows it sooner.

How long do I have to sue for a refund after the IRS disallows my claim?

Two years from the date the IRS mails the notice of disallowance by certified or registered mail, under section 6532(a)(1), and that period can be extended only by written agreement between you and the IRS. There is an earlier deadline to clear first: section 6511(a) requires the refund claim itself to be filed within three years from the time the return was filed or two years from the time the tax was paid, whichever expires later. Those two rules do different work and are easy to conflate. Section 6511 governs whether the claim was timely at all; section 6532 governs how long you have to take a timely-but-rejected claim to court. Missing the first means there is nothing to sue about; missing the second means you had a valid claim and lost the right to litigate it. A practical wrinkle is that a claim the IRS simply never answers does not start the two-year clock — you may sue any time after six months have passed, and the clock only begins if and when a disallowance is mailed.

Is the Tax Court small tax case procedure worth using?

It depends entirely on whether you would ever appeal, because that is what you are trading away. Section 7463 lets you elect small tax case procedures when neither the deficiency in dispute nor the claimed overpayment exceeds $50,000 for any one taxable year, with the Tax Court's concurrence. What you get is a genuinely informal proceeding: relaxed evidence rules, cases heard in more cities, and a forum built for taxpayers appearing without counsel. What you give up is stated in section 7463(b) in one sentence — the decision shall not be reviewed in any other court and shall not be treated as a precedent for any other case. There is no appeal, win or lose. For a factual dispute about whether your records substantiate a deduction, that is usually an acceptable price, because appellate courts rarely disturb factual findings anyway. For a dispute that turns on a contested legal question where you would want a circuit court to look at it, the regular procedure is worth the added formality. The election can also be discontinued before the decision becomes final, on request, if the case turns out to be bigger than it looked.

Can I stop interest from running while I fight the IRS in Tax Court?

Yes, without giving up your case, by making a deposit under section 6603. Interest on an underpayment runs from the original due date of the return regardless of how long the dispute takes, so a taxpayer who wins on 70% of the issues can still be surprised by the interest on the 30% they lost. Section 6603(a) lets you make a cash deposit against a tax that has not yet been assessed, and section 6603(b) provides that to the extent the deposit is later used to pay tax, the tax is treated as paid when the deposit was made — which stops the interest clock on the deposited amount from that date. Crucially a deposit is not a payment of tax, so it does not concede the liability, does not moot your Tax Court petition, and can generally be returned to you on request if you decide you would rather have the money back. The practical use is to deposit the portion of the proposed deficiency you privately expect to lose, and litigate the rest with the interest exposure capped.

Authoritative References

• IRC §6213 — Restrictions applicable to deficiencies; petition to Tax Court
• IRC §7422 — Civil actions for refund
• IRC §6532 — Periods of limitation on suits
• IRC §6511 — Limitations on credit or refund
• IRC §7463 — Disputes involving $50,000 or less
• IRC §6603 — Deposits made to suspend running of interest
• 28 U.S.C. §1346 — United States as defendant (refund suit jurisdiction)
• United States Tax Court — Starting a case

Related reading: What a CP2000 notice means · Surviving an IRS document request · The §6662 accuracy-related penalty · Superseding vs amended returns · When you cannot pay the bill

The Forum Is a Choice. The Evidence Was Decided Three Years Ago

§7491 only moves the burden to the IRS if you substantiated the items and kept the records — which is a decision you made long before the notice arrived. CentSense captures receipts with AI the day they happen, logs mileage automatically, and exports a CPA-ready CSV with the documentation attached. Free tier includes 10 AI scans per month; Solo is $5/month for unlimited scanning and mileage logging.

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This guide is general education for U.S. freelancers and Schedule C filers in 2026. It is not personalized tax advice and it is emphatically not legal advice. A statutory notice of deficiency carries a jurisdictional deadline that no article can extend — if one has arrived, take it to a CPA, an enrolled agent or a tax attorney immediately, while the 90 days still has room in it.