Know if AD/CVD applies before you ship.

Regular duties apply to every import based on HTS code and country of origin. Antidumping (AD) and countervailing (CVD) duties are additional, case-by-case duties Commerce imposes when a foreign producer sells below fair value (AD) or receives government subsidies (CVD). They can add anywhere from a few percent to 400%+ on top of the regular rate. Coverage is narrow — scoped to specific products from specific countries — but missing one creates significant underpayment liability.

Your filing system handles entry mechanics. Tandom handles the scope-determination question that sits in front of the entry: of the N active AD/CVD cases that match your HTS + country, which one actually covers your product? We read the narrative scope text, surface the company-specific rate cascade, flag the companion AD/CVD pair CBP's Project Harvest messages have been enforcing against, and generate a reasonable-care scope determination PDF with the operative scope text quoted in-line and Federal Register citations linked. It's the reasonable-care artifact your broker license exposure under 19 CFR 111 actually needs — file it alongside the entry and pull it back up when a CF-28 lands.

Yes. Tandom answers the two questions importers face without a broker's help: (1) "is this product from this country subject to AD/CVD" (pre-PO sourcing check) and (2) "at what rate on which entry date" (post-entry and audit contexts). For formal entry filing you still need a licensed customs broker — Tandom is research and documentation, not a filer. Paid tiers add scope-defensibility memos and historical rate-on-date lookup for reasonable-care files.

Yes. One lookup tells you which AD/CVD case covers your product, the deposit rate that was in effect on your entry date, the underlying Federal Register citation, and the full scope text. If the scope language doesn't actually reach your product, that's the starting point for a scope ruling application under 19 CFR 351.225(c) — work you'd take to a licensed customs broker or trade attorney. Free to view; no credit card required.

Four authoritative sources: the Federal Register (every scope determination, administrative review, rate change), CBP's Cargo Systems Messaging Service (CSMS) bulletins, Commerce ACCESS (the agency's case docket portal), and the USITC Investigations Document System (IDS). We ingest, structure, and cross-link these sources daily. Every scope-match Tandom returns cites the underlying FR notice, CSMS message, or scope ruling — the reasoning is traceable, not an opaque score.

Rates are pulled directly from the Federal Register notice that set them — country-wide, all-others, and named-respondent rates for every active AD and CVD case. When Commerce publishes a new administrative review or rate change, we ingest it the same day. Manufacturer-specific rates are matched against the named respondent list in each proceeding; Tandom surfaces the matched rate or falls back to all-others when a match isn't confirmed.