When a client calls about an IRS letter, capture three things on the first call: the notice number printed on the letter, the date on it, and what it says in the client's words. Mark the call urgent and book the soonest appointment. The reply date printed on the notice decides how much time you have, so every day counts.
Last verified: October 24, 2026. Primary sources: IRS, Understanding your IRS notice or letter, IRS, Understanding your CP2000 series notice, IRS FS-2017-7 and IRS, Power of attorney and other authorizations.
Why the first call matters more than it seems
Clients rarely call about an IRS letter the day it arrives. They open it, worry, put it in a drawer, and call when the worry wins. By then some of the time to respond is already gone. If your office then takes two days to call back, and another week to get a copy of the letter, a routine notice can turn into a missed reply date.
The IRS's own guidance is short: review the notice, keep it, and if it asks for a response, act by the due date. It adds that replying by the due date is what guarantees your appeal rights, and that even a client who cannot pay in full should pay what they can by the due date to reduce interest and penalty charges. All of that depends on one fact your office does not have until someone reads the letter: the date.
The three things to capture
| Capture | Where the client finds it | Why you need it |
|---|---|---|
| The notice number | The IRS says the CP or LTR number is in the right corner of the letter | It tells you which notice this is. You can look it up on IRS.gov before you call the client back. |
| The date on the letter, and any reply-by date | Printed on the notice | It sets your working deadline. Use the date the IRS printed; do not estimate one. |
| What it says, in the client's words | The client's summary: "they say I owe," "they changed my refund," "they want me to verify who I am" | It tells you how worried the client is and what to prepare. It is not a substitute for reading the letter yourself. |
Then ask for a copy. A clear photo or scan of every page, including any response form, is what your preparer actually works from. If your office texts an upload link during the call, the client can send it before they hang up, while the letter is still in their hand.
Why "in the client's words" is still worth recording
The client's description is often wrong in the details and right about the feeling. "They say I owe ten thousand" might be a CP2000 that proposes changes and, in the IRS's own words, is not a bill. Recording what the client believes helps your preparer open the callback with the right reassurance, and it flags the clients who are scared enough to pay a scammer.
Why every IRS letter call is marked urgent
Not every notice is serious, but every notice has a clock. Marking these calls urgent is not about panic; it is about making sure the letter gets read by someone who can tell the difference. Three reasons it belongs at the top of the morning list:
- Reply dates. The IRS says to act by the due date when it asks for a response. For a CP2000, the IRS says that if there is no reply it may send another notice and a bill.
- Appeal rights. The IRS says replying by the due date is how a taxpayer guarantees appeal rights when they disagree.
- Scams. A scared client is an easy target. The IRS says it initiates most contact by regular mail and does not call to demand immediate payment with a prepaid debit card, gift card or wire transfer. If the letter does not show up in the IRS's search, or looks suspicious, the IRS says to call 800-829-1040. A fast callback from your office is the best protection a client has against the second, fake "IRS" call.
What the phone agent must not say
Whoever answers the first call, whether a new front-desk hire or an AI receptionist, should not interpret the letter. That means no "it's probably nothing," no "you'll need to pay that," and no guesses about what a notice number means. Interpretation belongs to the preparer who has read every page and compared it with the return.
There is a second boundary. Before your office talks to the IRS on a client's behalf, it needs the right authorization. The IRS describes four kinds: a power of attorney (Form 2848), a tax information authorization (Form 8821), a third party designee named on the return, and oral disclosure, where the client brings you into a call with the IRS. The first call is a good moment for your staff to check which one is on file for that tax year, so the callback is not delayed by paperwork.
How the XyloDocs AI receptionist handles these calls
When a caller says they received a letter from the IRS, the receptionist follows the same script a careful front desk would:
- It asks for the notice number printed on the letter, the date on the letter, and what the letter says.
- It marks the message urgent, so it shows in red on the Calls page, and staff are notified in the app and by web push.
- It offers the soonest open appointment on your calendar and texts a confirmation when the client books.
- It can text an upload link so the client can send photos of the letter right away.
- It does not explain the letter or give advice. It tells the client someone from the office will review it.
If the client is upset, the receptionist notices and offers a person or a priority message. It answers in English or Spanish, whichever the caller chooses, and keeps that language for the call. After hours, it tells the client when the office reopens and the urgent message is waiting for your staff in the morning.
The photo of the letter is a client document, so it is read by private AI that runs on XyloDocs's own servers or on hardware in your own office, never sent to an outside AI company, never sold and never used to train AI models. Our security page has the details.
The phone conversation is handled differently: the receptionist uses outside AI and voice services to understand and answer callers. Our Privacy Policy explains how we handle personal information. The full feature list is on the AI receptionist page, and the rest of the platform is on the features page.
Frequently asked questions
Where is the notice number on an IRS letter?
The IRS says the CP or LTR number is in the right corner of the letter. Ask the client to read it exactly as printed, letters and digits, and record it with the date on the letter. With that number your office can look up the IRS's own explanation of the notice on IRS.gov before calling the client back.
How long does a client have to respond to an IRS notice?
It depends on the notice, so use the due date printed on it rather than a general rule. The IRS says to act by the due date when the notice asks for a response, and that replying by the due date guarantees appeal rights. For a CP2000, the IRS says that without a reply it may send another notice and a bill.
Should the receptionist tell the client what the letter means?
No. Whoever takes the first call should capture the facts and get the letter to the preparer quickly, not interpret it. A notice number alone does not show what changed or why. The preparer needs every page and the client's return to give an answer the client can rely on. Until then, the honest message is that the office will review it.
What if the client thinks the letter is a scam?
The IRS says to search for the notice on IRS.gov, and if it does not appear or looks suspicious, to call the IRS at 800-829-1040 rather than any number printed on the letter. The IRS also says it does not call to demand immediate payment by gift card, prepaid debit card or wire transfer. Your preparer can do this check with the client.
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