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Industrial sourcing and import guides

Primary-source-cited guides for US industrial sourcing and import teams. Build RFQs, compare manufacturers, evaluate landed cost, and investigate tariff and AD/CVD risk.

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Tandom

Tandom helps US industrial buyers find, evaluate, and develop manufacturers across Asia and Latin America.

Discuss a sourcing project →

Proud to partner with

Microsoft for Startups

NVIDIA

Inception Program

Sourcing

  • How it works
  • What you receive
  • How engagements work
  • Discuss a sourcing project

Free tools

  • Tariff Calculator
  • AD/CVD Lookup
  • AD/CVD Catalog
  • HTS Catalog

Resources

  • Resource Center
  • Trade compliance guides
  • Roadmap

Company

  • About
  • Contact
  • Security
  • Accessibility
  • Public API status
  • Tandom Brasil ↗
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© 2026 Fintora Technologies Inc., d/b/a Tandom.ai. All rights reserved.

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Made with ❤️ in São Paulo and San Francisco

Topics

Supplier sourcing

8 guides

How to compare overseas manufacturing quotes

A technical-gate-first supplier quote comparison template for normalizing price, currency, MOQ, tooling, Incoterms, freight, duty, lead time, and risk.

15 min read·Updated Aug 29, 2026

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How to create a quote-ready manufacturing RFQ

Build a manufacturing RFQ that controls drawings, revisions, volumes, substitutions, evidence, tooling, packaging, and supplier quote returns.

16 min read·Updated Aug 29, 2026

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How to develop an alternative manufacturer and qualify a second source

A stage-gated guide for turning an incumbent industrial part into a qualified, quote-ready, sample-backed alternative prepared for a first order.

16 min read·Updated Aug 29, 2026

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Supplier first-order readiness checklist before the first PO

Use four evidence-based release gates before a new industrial supplier receives the first PO, payment, production authorization, or shipment release.

17 min read·Updated Aug 29, 2026

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Manufacturing sample approval: prototype, FAI, and PPAP

Choose the right sample stage, verify production intent, record test evidence and deviations, and keep production release under buyer control.

18 min read·Updated Aug 29, 2026

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Asia vs Latin America sourcing: an industrial buyer framework

Compare process fit, supplier depth, qualification effort, actual lanes, origin, duties, and continuity before choosing a manufacturing region.

19 min read·Updated Aug 29, 2026

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How to verify a manufacturer's identity and capability

Confirm the seller, factory, exporter, payee, quality system, product capability, and capacity behind an overseas supplier quote.

17 min read·Updated Aug 29, 2026

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How to evaluate MOQ, tooling, lead time, payment terms, and capacity

A practical gate for evaluating a manufacturer's MOQ, price breaks, tooling, lead time, payment milestones, and demonstrated production capacity.

15 min read·Updated Aug 29, 2026

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Duty calculation

6 guides

How to calculate US import duties

A working guide to the inputs, the layers, and the math behind a US entry summary in 2026. MFN, Section 232, Section 301, Section 122, AD/CVD, MPF, HMF, with a real worked example.

12 min read·Updated May 5, 2026

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How Chapter 99 tariff layers stack on a single entry

How to read, order, and report Chapter 99 HTS codes alongside the base classification on a US entry summary in 2026. For brokers and compliance teams.

11 min read·Updated May 5, 2026

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How Section 232 steel, aluminum, and copper duties apply in 2026

What changed April 6, 2026, what stayed the same, and how to file a steel, aluminum, or copper line in ACE without leaving duty exposure on the table.

13 min read·Updated May 5, 2026

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How Section 301 China tariff exclusions work in 2026

What the 178 active Section 301 exclusions cover, how to claim 9903.88.69 on an entry, and what changes when the November 10, 2026 deadline passes.

11 min read·Updated May 5, 2026

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How to show landed cost at checkout for cross-border ecommerce

Implementation playbook for showing landed cost (duty + fees) at checkout after the August 2025 de minimis suspension. Decision matrix by volume, runnable Tandom API code, postal vs courier math, and a contrarian callout for when you should NOT integrate.

16 min read·Updated Aug 28, 2026

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How to choose a duty calculation API for cross-border ecommerce

Honest provider comparison across Zonos, Shopify Markets DDP, Easyship, Passport, Avalara CrossBorder, and Tandom. Pricing, integration breadth, AD/CVD coverage, DDP guarantee fine print, and decision framework by use case.

13 min read·Updated Aug 28, 2026

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AD/CVD

5 guides

How to check AD/CVD exposure by HTS code

A practical workflow for checking antidumping and countervailing duty exposure on a US entry. Why HTS-only checks fail, how to read the scope text, manufacturer rates, scope rulings, with a real lookup against an active order.

11 min read·Updated May 5, 2026

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How to read an AD/CVD case number and find the order scope

Decode case numbers like A-570-983 and C-489-830 to find country, petition type, and the Federal Register scope text fast. For brokers and importers.

9 min read·Updated May 5, 2026

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How to determine if a product is in scope of an AD/CVD order

Scope text is authoritative. The HTS list is illustrative. A practical guide for brokers to read scope, find past rulings, and file under 19 CFR 351.225.

12 min read·Updated May 5, 2026

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How to find the right manufacturer or exporter rate inside an AD/CVD order

Find the right manufacturer or exporter rate inside an AD/CVD order. Cash deposit cascade, separate rates, all-others, and PRC-wide rates for brokers.

12 min read·Updated May 5, 2026

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How to expose the Tandom AD/CVD lookup as a Claude MCP tool

Connect Claude to Tandom's read-only AD/CVD lookup over Model Context Protocol. Current tool catalog, JSON-RPC request shapes, and a worked example, in 2026.

12 min read·Updated Aug 28, 2026

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HTS classification

6 guides

How to find the right HTS code for your product

A working classification workflow: search by description, read the section and chapter notes, apply the GRIs, confirm the 10-digit suffix.

13 min read·Updated May 5, 2026

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Tariff classification for products with mixed materials and components

How to classify composite goods and retail kits with the GRIs: relative specificity, essential character, sets put up for retail sale, GRI 5 cases.

12 min read·Updated May 5, 2026

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How to request a CBP binding ruling

When to file an eRulings request, what to put in it, where it goes, and how the binding effect works. Written for brokers and compliance teams.

11 min read·Updated May 5, 2026

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How to bulk-review SKU descriptions for HTS classification

A practical CSV workflow for cleaning product descriptions, searching current HTS references, and routing every candidate code to documented human review.

8 min read·Updated Aug 28, 2026

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How to review broker HTS classifications with public HTS data

A disciplined second-pass workflow for checking filed codes, current legal text, duty layers, and trade-risk signals without pretending an API replaces judgment.

9 min read·Updated Aug 28, 2026

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How to use Claude or ChatGPT for safer HTS code research

A prompt and verification workflow that uses current read-only HTS tools to produce a candidate brief—not a made-up final classification.

9 min read·Updated Aug 28, 2026

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Customs ops

5 guides

The DTC import playbook after Section 321 ended

Nine operational steps from catalog audit to customer comms. Broker selection, ACE setup, entry-type decision, recordkeeping, and a worked transition timeline for a 80,000-order/month apparel brand.

15 min read·Updated May 7, 2026

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Postal vs courier duty rules for low-value imports

How postal and courier shipments are duty-handled differently into the US. The Feb 28, 2026 ad valorem cutover, per-package math on a $30 phone case, and AOV-band decision framework.

11 min read·Updated May 7, 2026

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How to subscribe to and triage CBP CSMS messages

How to subscribe to CBP Cargo Systems Messaging Service (CSMS) and triage the messages that change broker filing behavior, without losing the ones that matter.

12 min read·Updated May 5, 2026

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How to track CBP CSMS duty-rate changes for your import catalog

A practical manual workflow for US industrial importers to monitor CBP CSMS messages, identify affected HTS codes, verify duty impact, and document the handoff.

10 min read·Updated Aug 28, 2026

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How to extract HTS-ready fields from a commercial invoice

A manual, reviewable workflow for US industrial importers to turn a commercial invoice into structured product, origin, valuation, HTS, and duty inputs.

12 min read·Updated Aug 28, 2026

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Trade policy

2 guides

What changed for low-value shipments after the de minimis suspension

What changed for low-value DTC and ecommerce shipments after Section 321 de minimis was suspended in 2025. Filing, fees, and duty math through 2027.

11 min read·Updated May 5, 2026

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How to qualify a product for USMCA preferential treatment

A practical guide to qualifying a product for USMCA preferential tariff treatment. Rules of origin, the 9 certification data elements, and a worked example.

13 min read·Updated May 5, 2026

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APIs and automation

2 guides

How trade compliance APIs fit into broker workflows

Where trade compliance APIs can support a filing workflow, and where Tandom's current public surface stops: HTS research, duty calculation, AD/CVD screening, and read-only MCP tools.

11 min read·Updated Aug 28, 2026

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How to wire the Tandom Duty Calculator API into a TMS or broker software

Drop the Tandom Duty Calculator API into a TMS, broker software, or in-house ERP. Code samples, the response shape, and ACE reporting order, in 2026.

11 min read·Updated Aug 28, 2026

Read guide →

Tandom

Tandom helps US industrial buyers find, evaluate, and develop manufacturers across Asia and Latin America.

Discuss a sourcing project →

Proud to partner with

Microsoft for Startups

NVIDIA

Inception Program

Sourcing

  • How it works
  • What you receive
  • How engagements work
  • Discuss a sourcing project

Free tools

  • Tariff Calculator
  • AD/CVD Lookup
  • AD/CVD Catalog
  • HTS Catalog

Resources

  • Resource Center
  • Trade compliance guides
  • Roadmap

Company

  • About
  • Contact
  • Security
  • Accessibility
  • Public API status
  • Tandom Brasil ↗
For AI agentsllms.txtllms-full.txtConnect free import tools to your AIFree API overviewAPI reference

© 2026 Fintora Technologies Inc., d/b/a Tandom.ai. All rights reserved.

PrivacyTermsCookiesAcceptable Use

Made with ❤️ in São Paulo and San Francisco