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📋 How customs entry corrections work

When an entry summary is wrong, separate a pre-liquidation Post Summary Correction from a post-liquidation protest — then fix the clocks before you file.

lessons

~16 min

to learn

📈 Business

subject

Adults

level

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What you’ll learn

Find what is wrongIdentify a dated entry discrepancy from the commercial record and classify the correction stage before choosing a route.A correction starts with evidence on a real entry and a clear answer to whether the summary is still pre-liquidation.
Correct before liquidationPrepare an eligible Post Summary Correction with status checks, timing, reason codes, and a full duty recalculation.A PSC amends accepted ACE entry-summary data before liquidation within CBP's published windows — it is not a delete button.
Challenge after liquidationTreat liquidation as finality, assemble a timely specific protest when eligible, retain supporting records, and close on the official result.After liquidation, contest eligible decisions through protest (not PSC), keep the five-year record trail, and reconcile the outcome.

Questions this course answers

What is a Post Summary Correction?

A PSC corrects accepted entry-summary data in ACE before liquidation; it does not erase the original filing or replace a protest after liquidation.

Put the basic correction workflow in order.

Find the issue, fix the timeline, choose the lawful route, then prove closure against the official result.

Why should a broker not treat every post-liquidation error as a PSC?

Choosing the wrong route can leave an otherwise valid objection untimely or incomplete.

What proves that an entry correction is closed?

Closure requires the official agency result plus reconciliation of the affected transaction and follow-up actions.

Grounded in trusted sources

19 U.S.C. § 1514 — Protest against decisions of Customs Service: https://uscode.house.gov/view.xhtml?req=%28title%3A19+section%3A1514+edition%3Aprelim%29
19 CFR § 174.12 — Filing of protests: https://www.ecfr.gov/current/title-19/chapter-I/part-174/section-174.12
19 CFR § 159.1 — Definition of liquidation: https://www.ecfr.gov/current/title-19/chapter-I/part-159/section-159.1
19 CFR § 163.4 — Record retention period: https://www.ecfr.gov/current/title-19/chapter-I/part-163/section-163.4
U.S. Customs and Border Protection — Post Summary Corrections (eligibility, 300-day / 15-day window): https://www.cbp.gov/trade/programs-administration/entry-summary/post-summary-correction
U.S. Customs and Border Protection — Protests (post-liquidation relief via 19 U.S.C. 1514): https://www.cbp.gov/trade/programs-administration/entry-summary/protests
U.S. Customs and Border Protection — Entry Summary and Post Release Processes (15-day / 10-working-day clocks): https://www.cbp.gov/trade/programs-administration/entry-summary

Every Wunder lesson is built from real, reputable sources — never invented.

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