How HTS classification actually works
The General Rules of Interpretation in order, why the ten-digit code is chosen the way it is, and why "precedent-first" beats guessing.
The 2026 tariff stack, explained
Base rate + Section 122 surcharge + MPF + the 301/232 overlay — what stacks on top of what, in dollars, with the sunset math.
Claiming KORUS on Korean-origin goods
What the FTA actually zeroes, the MPF exemption most importers miss, the rule-of-origin check, and how to claim it on the entry.
Getting overpaid duty back (PSC & protest)
Post-Summary Correction vs. a §514 protest, the deadlines that kill a claim, and the $166B struck-down-tariff refund screen.
The reasonable-care checklist, mapped
What CBP's Informed Compliance actually asks of importers, the five-year lookback, and the written record that answers a CF-28.
What HTS code is an LED face mask?
The classic 8543 vs. 6307 split, worked end to end from real CBP rulings — a 7% swing on the exact same product.
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