Selling on Amazon, Shopify or your own store into the US? The moment you have nexus in a state, you must register for a sales tax permit, collect tax and file returns there — even as a non-resident. Extreme Filer checks your nexus first, registers you only where required, and files every return on time. 100% online, no US address of your own needed.
A sales tax permit — also called a seller's permit, sales tax license or sales tax ID — is your registration with a state's tax authority (usually its Department of Revenue). It gives your business the legal right — and duty — to collect sales tax from customers in that state and send (remit) that tax to the state on a set schedule.
It is state-by-state. There is no single "US sales tax permit": a permit for Texas covers Texas only, and a seller with obligations in five states holds five permits and files five separate returns. Sales tax rates, rules on what is taxable, and filing deadlines also differ in every state — which is exactly why sellers get this wrong when they try to copy a one-state setup everywhere.
A permit is not the same as a reseller certificate. The permit lets you collect tax from buyers; a reseller certificate lets you buy inventory tax-free from suppliers. Most sellers need the permit first. And a permit is different from your federal EIN — the EIN is federal and identifies your business to the IRS, while the permit is state-level and identifies you to that state's tax department.
Without a permit you have no authority to collect sales tax — and collecting it without registering is itself a violation in most states.
Amazon, Walmart Marketplace and serious US wholesalers ask for your permit and resale details during seller onboarding and brand approval.
Your permit comes with a filing frequency — monthly, quarterly or annual. Each period needs a return, even a zero-sales return.
Once registered, you can issue resale certificates to suppliers so you stop paying sales tax on stock you will resell.
Registering and filing from now forward stops unfiled-period exposure from growing — the worst sales tax problems are old, ignored ones.
State filings force accurate sales records state-by-state — the same records you need for Amazon reports, banking and your yearly IRS filings.
You only register in states where you have nexus — a real connection to the state. Registering everywhere "just in case" wastes money and creates filing duties you don't need; registering nowhere is how sellers end up with assessments. There are two kinds of nexus:
A physical presence in the state creates nexus immediately, from day one, with no sales minimum:
This is the one FBA sellers miss: Amazon moves your stock between fulfilment centres, so your inventory — and your nexus — can appear in states you never chose.
Since the 2018 Supreme Court Wayfair decision, states can require registration based on sales volume alone, with no physical presence at all:
Cross the threshold and your duty to register, collect and file starts — the state does not notify you first.
Your inventory sitting in Amazon warehouses creates physical nexus in those states. We map where your stock has been held, register you where required, and align your filings with Amazon's marketplace-facilitator collection so you never double-pay.
Your own store is not a marketplace facilitator — collecting and filing is entirely on you once you cross a state's threshold. We register you, help you switch on correct tax collection in your store settings, and file the returns.
Foreign-owned US LLCs selling goods into the US face the same nexus rules as US sellers — with extra friction on state applications that assume a US address and SSN. We handle the non-resident paperwork route for you.
Selling to US retailers and distributors means permits plus managing resale certificates from your buyers — and issuing your own when you buy stock. We set up both sides properly.
Missed returns can get a permit revoked or made inactive — and selling on an inactive permit is a serious problem. First check whether you need our seller's permit reactivation help instead — we will tell you honestly which one your case is.
Crossing $100k in a second, third or tenth state is a good problem — if each new registration, calendar and return is handled before the deadline, not discovered after an assessment notice.
Almost every state with a sales tax now has a marketplace facilitator law: when a sale is made through Amazon, eBay, Etsy or Walmart Marketplace, the platform — not you — must collect and remit the sales tax on that sale. For pure marketplace sellers this removes most collection work.
It does not remove your registration and filing picture entirely:
Our nexus check separates your marketplace sales from your direct sales state-by-state, so your registrations match what the law actually requires of your channel mix — nothing more, nothing less.
Tell us where you sell, through which channels, roughly how much per state, and where any inventory sits. We identify exactly which states require registration — free, before you pay anything.
We complete each state's registration using your LLC details and EIN, through the route that works for non-resident owners, and chase the state until the permit is issued.
You receive your permit/license number, your state tax account login details, your assigned filing frequency, and clear instructions for switching on collection in Amazon/Shopify/your store.
Each period, send us your sales report (or we work from your marketplace reports) and we prepare and file the return and tell you exactly what tax is due, before the deadline — every period, including zero-sales periods.
What we need from you: your LLC formation documents, your EIN letter, the owner/responsible party's details, your sales channels, and approximate sales by state (marketplace reports are ideal). If your company is not formed yet, start with US LLC formation and the EIN — a permit cannot be issued without them.
Honest timing: state processing ranges from same-day online issuance in some states to several weeks by paper in others, and non-resident applications are more likely to be handled manually. We give you a realistic estimate per state before filing and keep you updated.
| Sales Tax Registration | Sales Tax Returns | |
|---|---|---|
| What it is | One-time registration with each nexus state for your seller's permit / sales tax license | Recurring report of sales and tax, filed with each state for every period |
| When | Before you start collecting tax in that state — ideally as soon as nexus begins | Monthly, quarterly or annually per state, on that state's due dates |
| If you skip it | Unregistered collection, back-tax exposure with no filing clock running, marketplace onboarding blocks | Late penalties and interest, permit revocation, and eventually estimated assessments by the state |
| Zero sales? | — | You still file a zero return. Silence is treated as a missed filing, not as "nothing to report" |
| Our service | Nexus check + registration filed for you in each required state | Return prepared and filed each period from your sales reports, with the exact amount due confirmed to you first |
Rate accuracy matters too: US sales tax is destination-based in most states and rates stack — state + county + city + special districts can mean thousands of different combined rates. Your store/marketplace settings must use the buyer's delivery address rate, and your return must reconcile with what was actually collected. We flag mismatches instead of filing numbers that don't tie out.
Growth creates new nexus mid-year. A seller registered in 2 states in January may owe registration in 6 by December — we re-check your state-by-state sales as part of return filing.
File every period, keep your business address and responsible-party details current with the state, and respond to state notices promptly. Repeated missed returns are the most common route to a revoked or inactive permit.
Your sales tax records should agree with your bookkeeping and your yearly IRS information filings (such as Form 5472 for foreign-owned single-member LLCs). We keep the whole picture consistent under one roof.
No prices on this page — deliberately. State fees, the number of states and your filing frequency change the real cost. Message us your channels and main states and we will give you one exact quote on WhatsApp before any work starts.
Send us your sales channels and your main states on WhatsApp. The nexus check is free — and you get one exact quote for registration and returns before you commit to anything.
Chat on WhatsApp — +92 318 2993521Or email us at sales.extremefiler@gmail.com