IRS letter in Canada: replying to CP2000 and penalty notices

I live in Canada and got an IRS letter: what kind is it, and what deadline applies?

The notice number determines what the IRS wants. Record the tax period, notice date and reply or payment deadline before deciding whether to agree, pay or send evidence.

Each notice prints its own reply or payment date; for a CP2000 the IRS manual sets it 30 days after the notice date (IRM 4.19.3). Reply by it, or ask for more time before it passes. A notice of deficiency is different: the IRS says it cannot extend the time to petition the Tax Court, so check first whether you hold one. Keep the whole notice and envelope.

What is a CP2000, and is it a bill?

A CP2000 proposes a change after the IRS compares third-party information with your return. The mismatch can increase tax, decrease tax or leave tax unchanged; the CP2000 itself is not a bill (IRS: CP2000).

If you do not reply or the difference is not resolved, the IRS may send another notice and a bill, and a notice of deficiency follows when no agreement is reached or no response or extension is received (IRS: CP2000; IRS: Publication 5181).

Check the payer, income type and amount against the actual US return, including attached schedules; income on your Canadian return does not show it was correctly reported on your US return (see Americans living in Canada). Identify where each disputed item appears on the return, or why the proposed treatment is wrong, rather than only saying you already reported your income (IRS: Publication 5181).

The letter went to my old US address or reached me late: does the deadline still apply?

Do not assume forwarding or late delivery restarts an IRS deadline. For a notice of deficiency, the filing period runs from mailing. A copy of an unclaimed notice sent back to you does not restart it, though the IRS may reissue the notice with its own last day to petition (IRS: notice-of-deficiency procedures).

The IRS mails to your last known address: generally the address on your most recently filed and properly processed return, unless you gave clear notice of a different one. Telling a payer or another government agency does not count, except the US Postal Service. The IRS also updates its records from the Postal Service change-of-address database, and a matching new address there stays your last known address until a later processed return or clear notice changes it (26 CFR 301.6212-2). An address on Form 2848 does not change it (IRS: Form 2848 instructions).

Use Form 8822 to update your home mailing address; where to send it depends on where your old address was (Form 8822 instructions). Processing can take four to six weeks, so keep dealing with the existing notice meanwhile (IRS: address changes).

For a CP2000 that reached you late, say so and ask for more time by phone or in writing and keep a record. IRS procedures call for one extension of 30 days on request, with more only in extenuating circumstances (IRM 4.19.3). No request can extend a Tax Court petition deadline (IRS: CP3219A).

If a deficiency notice went to an old address after you notified the IRS, get its validity and deadline reviewed promptly, and keep the envelope, proof of the address notification and proof of where you were when it was mailed.

How do I reply from Canada: upload, fax, mail or phone?

For a CP2000, the IRS accepts uploads, fax and mail. Use the channel and destination for that notice; another letter may have different instructions (IRS: CP2000 reply options).

Upload: start from the IRS notice page and follow its Document Upload Tool instructions; keep confirmation. Fax: use the fax number for the office on your notice; keep the transmission report. Mail: use the notice's reply address, allow delivery time and keep delivery evidence. Phone: use the notice's number for questions or more time, and confirm what written response is still needed.

A practical CP2000 response contains any included response form, an explanation matching each disputed item and copies of supporting records. If you disagree, do not sign the agreement portion; if you agree on a joint return, both spouses must sign (IRS: Publication 5181). On a joint return each spouse is responsible for the whole amount, even after a divorce; a spouse who did not know of the item can ask for relief on Form 8857, generally within 2 years of the first IRS attempt to collect (Form 8857 instructions).

For international account assistance, the IRS lists 267-941-1000, Monday through Friday, 6 a.m. to 11 p.m. Eastern time (not toll-free). It also offers live chat for international taxpayers, which needs an IRS online account (IRS: international contacts). Keep the complete submission, proof of sending and a dated note of calls.

Should I agree, disagree or amend when the mismatch involves Canadian income?

Agree only after checking the proposed tax treatment against your records. Disagree with the items you can support; amend through the notice process when additional corrections are needed (IRS: CP2000 instructions; Publication 5181).

• All proposed changes are correct and nothing else needs correcting: follow the agreement instructions; no amended return is needed.
• Some or all are wrong: explain each disagreement and attach evidence.
• The proposal is correct, but other income, credits or expenses also need correcting: prepare Form 1040-X, mark it CP2000 and submit it with the notice response as directed. An amendment alone should not replace the notice response.

For a Canadian investment or property sale, send proceeds, cost, selling costs and the Form 8949 or Schedule D entry, translated into US dollars. A sale can need reporting even without an information slip (IRS: Form 8949 instructions; IRS: Publication 54). Why the two countries show different gains is in Selling investments as an American in Canada.

For employer shares, send grant, exercise or vesting records, payroll records and sale statements, and check whether income already included as compensation belongs in the US cost basis (IRS: Form 8949 instructions). The basis is covered in Stock awards and pay after a move.

For a foreign tax credit, send Form 1116, the Canadian assessment, proof of payment or withholding and exchange-rate calculations. The credit is limited, so Canadian tax paid does not by itself remove the proposed US tax (IRS: Form 1116 instructions); see Why you still owe the IRS after paying Canadian tax. If a Canadian reassessment changed the tax behind your US credit, see Amending your return after the other country changes yours.

For a mismatch on a US retirement account distribution or US pay for work done in Canada, see US retirement accounts in Canada or Working across the border.

Can my accountant reply for me, and how does Form 2848 work from abroad?

For a CP2000 only, the response form has an authorization section that lets someone contact the IRS about that notice. Form 2848 covers any other matter you authorize (IRS: CP2000).

Form 2848 names an individual in one of the categories in its Part II. Attorneys and CPAs must be admitted or licensed in a US state, territory or the District of Columbia, so a Canadian accounting designation alone does not qualify, and preparing your return alone does not establish unrestricted representation rights (IRS: Form 2848 instructions; Form 2848, Part II; 31 CFR 10.2). One exception helps from Canada: an individual may represent a taxpayer who is outside the United States before IRS personnel when the representation takes place outside the United States, with the licensing column left blank (31 CFR 10.7(c)(1)(vii)).

Form 2848 should specify the matter, return form and exact tax periods, with a separate authorization for each spouse on a joint return. If you sign first, the representative must sign within 60 days when you live abroad (Form 2848 instructions). Submit it online, by fax or by mail; an electronically signed authorization must go online. From outside the United States, use the International CAF Team destination in the instructions; a specific-use authorization goes to the office handling that matter (IRS: Form 2848 instructions).

Form 8821 gives access to tax information without authorizing representation. For choosing a preparer and arranging access to both countries' records, see When you need a cross-border accountant.

The letter is a balance due or a penalty: can I get a payment plan or penalty relief?

You can ask for a payment plan if you cannot pay in full, and the IRS removes some late-filing and late-payment penalties automatically or on request. Neither step removes the tax. For a CP14, paying in full by the notice date avoids further interest, and the IRS asks you to contact it by that date if you cannot; if the balance looks wrong, contact it with payment or return records (IRS: CP14).

These are online application conditions, not guaranteed approval. If online access is unavailable, the paper request is Form 9465, which a CP2000 agreement can carry (IRS: Publication 5181). Interest and applicable penalties can continue while a balance is paid over time (IRS: payment agreements).

Paying from Canada. Pay in US dollars. Without a US bank account, the IRS describes a wire from your bank, using the IRS Same-Day Taxpayer Payment Worksheet and a tax type code (10407 for a Form 1040 payment on an IRS notice), or a card payment through a third-party processor. Fees may apply, so pay early (IRS: foreign electronic payments; IRS: Publication 6147-C).

A CP2000 can propose penalties as well as tax (IRS: Publication 5181). One is the accuracy-related penalty: 20% of the part of an underpayment attributable to negligence, disregard of rules or a substantial understatement; the IRS gives omitting income shown on an information return as an example of negligence. The relief routes below do not list it. Follow any dispute instructions on the notice; the IRS says it may remove or reduce some penalties for reasonable cause (IRS: accuracy-related penalty).

Automatic Exemption from Penalty can prevent the specified late-filing and late-payment penalties when an eligible original Form 1040 for tax year 2025 or later finishes processing. It depends on timely filing and payment over the three prior years, the original return arriving within three years of its due date and, for a joint return, both spouses meeting that history. The IRS sends a letter when relief applies; contact it if a penalty is assessed despite apparent eligibility (IRS: administrative penalty relief; IRS: procedural update).

First Time Abate is the request-based route for periods automatic relief does not cover, including 2025 returns it did not consider. It needs the same three-year history, with no penalties in those years unless removed for reasonable cause or IRS error, and it ends for returns due on or after January 1, 2027. Call the IRS or send a written statement or Form 843; you need not name it or attach documents. Otherwise you may request reasonable-cause relief. The IRS lists only failure-to-file, failure-to-pay and failure-to-deposit penalties as eligible, so these routes do not reach FBAR or foreign information-return penalties, and neither removes the tax. Relief on a penalty also reduces or removes interest on that penalty, not on the unpaid tax (IRS: administrative penalty relief).

For an FBAR or Form 3520, 5471 or 8938 penalty, start with Missed foreign reporting after filing US returns. Catching up on missed foreign reporting covers reasonable-cause wording and penalty-notice removal, but it is written for people living in the US, so its Streamlined Domestic route does not apply from Canada.

The IRS wants to verify my identity: can I do it from Canada?

Generally, by the route your letter offers. The Taxpayer Advocate Service lists Letter 5071C as online and phone, 4883C as phone only, and 5447C, the foreign-address letter, as phone and mail (Taxpayer Advocate Service: identity verification letters). Use online verification only if a CP5071 offers it (IRS: CP5071), call the hotline on a 4883C (IRS: 4883C), and for a CP5447 use the phone, mail or upload alternatives the IRS lists when online verification is unavailable (IRS: CP5447).

Have the letter, the return it identifies and supporting documents ready, and tell the IRS if you did not file that return. A representative can assist with a 4883C call under Form 2848, but the IRS encourages you to be available; without that authorization, join the call with your helper (IRS: 4883C).

If you cannot verify a 4883C by phone, the IRS asks for an in-person appointment at a local IRS office, and taxpayer service at foreign posts of duty is no longer available (IRS: 4883C; IRS: international contacts). For the Taxpayer Protection Program phone line, the Taxpayer Advocate Service says taxpayers living outside the United States should call 267-941-1000, which is not toll-free (Taxpayer Advocate Service).

The IRS says I never filed: what now?

A CP59 means the IRS has no record of the return, which can differ from whether you actually filed. Check your filing records and whether an electronic return was rejected. If you did not file, the notice asks you to file immediately or explain why you do not need to file. No action is needed if you filed within the last eight weeks; if you filed longer ago, follow the notice instructions for a signed copy. Form 15103 is available to explain a mistake or why a return was not required (IRS: CP59). Filing late can cost a refund: a late original return generally recovers only tax paid within three years before filing, and withheld or estimated tax counts as paid on the due date (26 U.S.C. 6511(b)(2); 26 U.S.C. 6513(b)).

If the letter proposes tax for a year you did not file and is a CP3219N, it is a notice of deficiency, not a CP59. Go to the Tax Court section below the day it arrives: filing the return does not extend its petition deadline (IRS: CP3219N).

If you never filed while living in Canada, see Catching up on missed US returns. Streamlined procedures exclude taxpayers under an IRS civil examination for any tax year, and those under criminal investigation. The IRS eligibility page does not say whether a CP2000 alone counts as that examination; have the notice and account status reviewed before choosing a catch-up route (IRS: streamlined eligibility).

I now have a notice of deficiency: how long do I have to go to Tax Court from abroad?

A notice of deficiency (the IRS calls it a "90-day letter") is the IRS's formal proposal to assess tax. Use the last day printed on the notice. Talking to the IRS does not extend the Tax Court deadline (IRS: CP3219A; IRS: CP3219N).

If you agree, sign and return the enclosed response form (Form 5564 with a CP3219A). If you disagree, reply with your evidence now, and file a petition with the Tax Court by the printed date if you want the court to decide.

The statute gives 90 days from mailing, or 150 days if the notice is addressed to a person outside the United States. (26 U.S.C. 6213(a); IRS: Publication 556).

The CP3219A webpage describes only the ordinary period. IRS procedures also describe the longer period where the taxpayer was outside the United States when the notice was mailed, and call for case-by-case review when the IRS knew the taxpayer was abroad but had only a domestic address (IRS: notice-of-deficiency procedures). So do not assume an old US address settles the deadline either way. Treat the printed date as your working deadline: a later printed date can protect timeliness under section 6213(a), and an apparent conflict with the overseas period needs prompt review (26 U.S.C. 6213(a)).

Negotiating, sending evidence, amending or filing a missing return does not extend the petition period. File the petition with the Tax Court, not the IRS: the Tax Court encourages electronic filing through its DAWSON system, which needs a registered account, and the notice page links a petition form to mail with your notice attached (IRS: CP3219N). The rule that treats a US postmark date as the filing date does not apply to mail deposited with Canada Post or another country's postal service, so allow for delivery time (26 CFR 301.7502-1). Do not leave filing to the last day.

When should I hand the IRS letter to a professional?

Get professional review promptly when a deadline is close or disputed, the proposed amount is substantial, employer-share basis or foreign tax credits are involved, or several returns are missing. A deficiency notice needs a decision about protecting court rights while the tax issue is reviewed.

Gather the notice, filed US return and schedules, Canadian return and assessment, relevant slips and statements, payment evidence, earlier correspondence, proof of sending and, for an old-address issue, the envelope and address-change records. Cases involving two countries' calculations or statutory deadlines can call for cross-border tax review.

Example

Illustrative amounts, all in US dollars. A Canadian resident receives a CP2000 proposing to treat US$20,000 of share-sale proceeds as unreported gain. The filed Form 8949 already shows US$20,000 proceeds, US$15,000 cost basis and US$5,000 gain.

The resident checks that the statement and return concern the same transaction, disagrees with the proposed addition, and sends the response form, the filed Form 8949, the sale statement and basis evidence by the notice deadline. The explanation identifies the return entry instead of merely saying Canadian tax was paid. The IRS then reviews the response and writes back; the example assumes no outcome.

Different for you?

• A notice of deficiency, disputed deadline or substantial shares-and-credit adjustment: arrange cross-border tax review promptly; court rights and two countries' calculations may both need attention.
• An FBAR or Form 3520, 5471 or 8938 notice: see Missed foreign reporting after filing US returns.
• US returns were never filed: see Catching up on missed US returns.
• The CRA changed tax supporting your US credit: see Amending after the other country changes your return.
• The letter is from a US state tax agency, not the IRS: see US state tax after moving to Canada.
• You are not a US citizen or green card holder and the letter concerns US rental income: see Canadians with US rental property.
• You need a preparer and access to IRS and CRA records: see When you need a cross-border accountant.