US Sales Tax Compliance for Cross-Border and Amazon Sellers

If your company sells, raises funds, invoices customers or holds inventory across China, Hong Kong and the United States, US sales tax for Amazon sellers / sales tax nexus for foreign sellers is not a side issue. The practical question is where a registration, tax return, report or supporting file becomes expected, and which entity owns that duty. EasyTax turns that question into a working compliance plan: we review the facts, separate marketplace activity from direct sales, map the filings, and keep the Chinese-speaking management team clear on what must be done before money, goods or platform data move again.

How US sales tax applies in practice

For cross-border sellers, the issue is often a mismatch between the marketplace entity, inventory location, settlement account and state tax account. A company’s place of formation is only part of the picture; sales activity, inventory and platform records also matter.

Our working file records the selling entity, marketplaces, inventory locations, state accounts, filing history and missing records. Rates, thresholds, filing dates and other figures are confirmed against the current rule and the client file before action is taken.

How we organise the sales tax review

• Sales fact review — match the marketplace entity, sales activity, inventory location, settlement records and contract path before assessing a filing position.
• State nexus roadmap — identify which registrations, tax accounts, reports or supporting schedules are relevant to nexus review, marketplace reconciliation, registration, return filing and exemption handling.
• Sales tax records — organise marketplace reports, settlement records, inventory data, state accounts and prior filings into one usable file.
• Return filing rhythm — align finance, operations and external preparers before a sales tax filing is due.
• Sales tax monitoring — revisit the position when a new state, marketplace, warehouse or selling arrangement changes the facts.

How the sales tax file is built

The file brings together the selling entity, marketplace, inventory location, state accounts, filing history and outstanding records. It also identifies the person responsible for the next step, so finance, operations and preparers work from the same facts.

For marketplace sellers, we compare platform reports, settlement records, inventory information and state filings. The sales tax position should go no further than the records can support.

Why EasyTax helps

EasyTax is an Amazon SPN certified service provider and a TikTok TSP certified service provider, working across the US, Hong Kong and mainland China. We help teams align marketplace sales, inventory, settlement records and state tax information.

Cross-border teams may have founders, operating staff, entities, warehouses and marketplace accounts in different places. We organise the sales tax facts in bilingual working files that management, finance and external preparers can use together.

Questions cross-border sellers ask about US sales tax

When should we review US sales tax for Amazon sellers / sales tax nexus for foreign sellers? Review it before a new entity starts trading, before inventory or funds move through a new country, and whenever platform sales or direct contracts materially change. If a rule contains a sales threshold, filing date or ownership count, EasyTax confirms the live figure for the exact state, country or authority before implementation.

Can a foreign owner handle this without a local office? Sales records and filing coordination can often be handled remotely. State account access, signatures and authorised representative arrangements depend on the applicable requirements.

What documents do you usually request first? We begin with marketplace reports, settlement records, inventory information, bank statements, state account details and prior filings. The aim is to match sales, inventory and filing records.

Will EasyTax give a final sales tax conclusion from this page? No. Any rate, threshold, deadline, transaction count or state-specific conclusion must be checked against the current rule and the client’s sales and inventory records.

This page is educational and not tax advice. Sales tax figures and filing conclusions are confirmed against the current rule and the client file before filing or implementation.