Modification and Clarification of the National Customs Automation Program Test Regarding Post-Summary Corrections
CBP modified the NCAP test for Post-Summary Corrections, affecting how importers correct errors on entries after release. The test now requires electronic filing via ACE and limits corrections to certain data elements. This impacts importers who frequently amend entries, especially those using de minimis or Section 301 exclusions.
Aforeworn detected this change in the Small Cross-Border Importers space on July 14, 2026 and published this briefing so affected operators are forewarned rather than caught off guard. It is rated High urgency. Small cross-border importers, especially those sourcing from China, apparel, electronics, and dropship-to-DTC sellers who use Post-Summary Corrections to adjust HS codes, values, or country of origin. should confirm how it applies to their specific situation before acting. There is a time constraint attached: Effective immediately; compliance required by August 1, 2026.. Acting after that point can mean penalties, a lapsed licence, or lost eligibility — exactly the kind of surprise Aforeworn exists to prevent. Aforeworn monitors Small Cross-Border Importers continuously and turns every detected change into a plain-English briefing like this one, so you always know first. Forewarned is forearmed.
What changed
CBP modified the NCAP test to require electronic submission of Post-Summary Corrections through ACE, with restrictions on which data elements can be corrected and a shorter filing window (now 15 days from release instead of 30).
Who it affects
Small cross-border importers, especially those sourcing from China, apparel, electronics, and dropship-to-DTC sellers who use Post-Summary Corrections to adjust HS codes, values, or country of origin.
What you must do
Update internal procedures to file all Post-Summary Corrections electronically via ACE within 15 days of release. Ensure staff are trained on the new data element restrictions.
Deadline
Effective immediately; compliance required by August 1, 2026.
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