What happens if I ignore an IRS CP notice?
The notice stops being a proposal. Most of these letters set out a change the IRS intends to make and give you a period to disagree or to supply what is missing. Let that period pass and the same figure is assessed, with collection following from the assessment rather than from a proposal you could still have answered with a document. The loss is not the argument, it is the forum. Answering in time is a document exchange. Answering afterwards means asking for something already decided to be reopened, which is slower, narrower, and sometimes not available at all.
Does answering a CP letter mean I am being audited?
Usually not. Most notices that reach filers abroad are computational or matching notices: the IRS has recalculated something, or its records show an amount your return does not. Neither is an examination. They are answered with a document — a schedule, a statement, a foreign payer's annual summary — rather than with an argument, and once the document explains the difference the notice closes. Treating a matching notice as though it were an audit invites a wider exchange than the letter asked for. Read what the notice says it is before deciding how much to send.
The IRS says I under-reported income I already declared, why?
Because the reported amount and the return do not line up in the place the IRS looks. Income declared in a different character, on a different line, converted at a different rate, or reduced by a treaty or credit position taken elsewhere on the return, all read as a gap to a matching system. The response is a reconciliation: this figure, this source, this line of the return, and here is where it was credited or excluded. None of that requires conceding the position. It requires showing the notice where the money went.
Do I need to write a legal argument to answer an IRS notice?
Rarely. The response has a shape: identify which notice it is, state what the mismatch is, and supply the missing evidence. Where a treaty article or a credit position explains the difference, it is set out plainly and supported, not argued at length. Long submissions on a matching notice tend to raise questions the letter never asked. The exception is a notice that reflects a position you dispute rather than a document you omitted. Then the reasoning matters, and it matters that it is on the file before the response period ends.
What if the IRS notice reached me late because I live abroad?
Work from the notice, not from the envelope. The period to respond is measured by the letter itself, so post that crosses an ocean quietly consumes the time you had. Two habits deal with this: treat the date on the notice as the start, and open every notice on arrival even when the figure looks obviously wrong, because the deadline is the part that changes your rights. Where the period has already gone, say so in the response and explain the delay. That is a different request from the one the notice invited, and it should be made explicitly.
Which IRS notice deadline actually matters for my rights?
Each notice carries its own, and they do different work. Some periods only preserve an easy administrative correction. Others are the point at which a proposed change becomes an assessed one, or at which a route of review opens or closes. That is why the first step is identifying the notice rather than reading the figure: the figure tells you what is at stake, the deadline tells you what you can still do about it. On a cross-border file this matters more, because the evidence usually has to come from a foreign payer or a foreign tax authority before the response can be made at all.
How do I actually stop being taxed twice?
In this order. Fix your residence under each country's own rules, and if both claim you, apply the treaty tie-breaker. Identify where each type of income is sourced. Read the article that covers that income type, because it decides who taxes and at what maximum rate. Then claim the relief on the residence-country return, with proof of the foreign tax. Most of the tax people lose to double taxation is lost at the last step, not the first. See how double taxation is relieved.
Do I get credit for all of the foreign tax I paid?
Only up to your own country's tax on that same income, and only for tax you were legally obliged to pay. Two consequences follow. Living somewhere that taxes you more heavily than your residence country does leaves an excess that becomes a carryover rather than a refund. And withholding suffered above the treaty rate is not creditable — the route back to that money is a refund claim in the country that took it. See claiming the credit.
