I Received an SII Notice Under Article 63: What It Means and How to Respond.

A notice (citación) under Article 63 of the Tax Code is the formal communication through which Chile's IRS (SII) asks a taxpayer to file a return, or to rectify, clarify, expand, or confirm a prior one, within one month. It is also one of the acts that formally opens what the Tax Code, in Article 59, calls an audit procedure, a meaningful distinction because it delimits which facts and periods will be reviewed, and those cannot be reviewed again once the audit is closed. It is not a penalty or an accusation, it is the step before one: if the response does not satisfy the SII, the next step is a tax assessment (liquidación).

The Deadline

The deadline to respond is one month, extendable once, for up to one additional month, at the taxpayer's request. Once the extension is requested, the SII must grant it: since the Law 21.713 reform, the extension is no longer discretionary. The request must be filed before the original deadline expires; an extension requested late does not revive a deadline that has already lapsed.

The notice produces an effect that is rarely noticed: it extends by three months the statute of limitations for the taxes tied to the specific transactions it identifies (Article 200). If an extension is granted, the statute of limitations is extended by that additional term as well. There is a second, later effect: once the notice has been answered, the SII may require the response to be clarified or supplemented within one month, without that request counting as a new notice, and that request adds one more month to the statute of limitations.

The Real Risk

Failing to respond to the notice is not, by itself, an infraction. But it leaves the SII free to appraise the tax base using whatever information it already holds (Article 64): it is precisely the lack of a response, or the failure to substantiate the values used, that enables that appraisal. When what is being questioned is specifically the price or value of a transaction, that appraisal is governed by Article 64 of the Tax Code, which requires the SII to issue a prior notice and give the taxpayer the chance to prove that the transaction was carried out at fair market value. In cases where the notice is a mandatory step, a taxpayer's silence clears the SII's path, it does not block it.

The greater risk lies elsewhere: what is answered, and how it is answered, sets the terms for everything that follows. The records submitted, and the explanations given or left out, all remain in the case file. A rushed or incomplete response can close off defenses that were otherwise available.

What Can the Audit Lead To?

If the response does not resolve the SII's questions, the process can lead to different acts, each with its own effects and its own path to challenge them: a tax assessment (liquidación, Article 24), which determines tax differences, adjustments, interest, and penalties, and which can be challenged before the Tax and Customs Court; a tax bill (giro, Article 37), which is the order to pay the tax and which, in certain cases, the SII can issue directly, without a prior assessment; and a ruling (resolución), issued, among other cases, when the dispute concerns the value or price of a transaction under Article 64, or when a taxpayer's request is denied. Identifying which of these acts has been served matters, because it determines both the deadlines and the available path to challenge it.

The Deadlines Run for the SII Too

The audit is not open-ended. Once it is established that the taxpayer submitted all the required records, the SII has nine months to issue a notice, an assessment, or a tax bill (Article 59). That term is twelve months in qualified cases, including transfer pricing, sales above 5,000 UTM (a Chilean monthly tax unit), corporate reorganizations, and transactions between related parties, and eighteen months when the audit requires information from foreign authorities or falls under an evidence-gathering procedure or the anti-avoidance rules, a term that in those cases can be extended once, for up to six additional months, by a reasoned resolution.

Once those deadlines have passed without a notice, ruling, tax bill, or tax assessment having been issued, the taxpayer can request certification that no differences exist, formally closing the review. And the SII cannot audit the same facts again, except for the exceptions set out by law. A properly closed audit also protects the taxpayer.

What to Do Before Responding

• Identify exactly which transactions the notice questions, and for which periods. The notice defines the scope of the audit.
• Gather the supporting records for those transactions: accounting books, invoices, contracts, appraisals, correspondence. Preserve everything, including what is unfavorable.
• Assess the substance of the position with a specialist before writing a single line. This is the stage where it is decided whether to submit records, file a correction, or lay the groundwork for a future claim.
• Track the calendar: the response, any follow-up request, the eventual assessment, and the deadlines to file a claim are all part of a single timeline.

What Not to Do

• Responding the same day, without a strategy, just to "get it off the desk."
• Submitting records that are incomplete or contradict each other.
• Ignoring the notice and hoping it expires.
• Requesting the extension on the last day.

Frequently asked questions

Does the notice mean I will have to pay?

No. It means the SII has questions about specific transactions. A well-supported response can close the review with no tax differences at all, and even with formal certification that none exist.

Can I respond myself, or through my accountant?

Yes, it's possible. But the notice is the last stage where the taxpayer's position can still be built freely, before the case takes on a contentious shape. What is submitted here shapes any later claim.

How long can the audit last?

With complete, certified records, the SII has nine months to issue a notice, an assessment, or a tax bill, a term that rises to twelve or eighteen months in qualified cases (Article 59).

What happens if the deadline has already passed?

The SII can issue an assessment using whatever records it has. Administrative and judicial options remain available against that assessment, each with its own deadlines that should be reviewed immediately.

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