- Jun 19
- 7 min read
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To use automated sales tax, you connect tax software to your store, switch on collection for the regions where you owe tax and let it add the correct rate to every order at checkout. It takes just a few steps to automate sales tax when you create an eCommerce website, whether you are making your first sale or already selling at scale.
Wix automates tax calculations for global eCommerce, applying the right tax rate at checkout and keeping it up to date as your business expands into new markets.
In this guide, you will learn how to use automated sales tax for eCommerce, from finding where you owe tax to collecting it at checkout and staying compliant.
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TL;DR: how to use automated sales tax for eCommerce
Automated sales tax software works out the correct tax for each order and applies it automatically, so you collect the right amount everywhere you sell without tracking rates by hand. The table below breaks the process into six steps.
Step | What you do |
01. Check your nexus | Find the states where your sales mean you must collect |
02. Choose a tool | Pick automated sales tax software that fits your store |
03. Connect and set regions | Link it to your store and switch on collection by region |
04. Set product taxability | Give each product the right tax category |
05. Collect at checkout | Let the tool add the correct tax to every order |
06. Review and file | Use the reports to file and remit on time |
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How to use automated sales tax for eCommerce in 6 steps
Before you switch anything on, work out where you actually have to collect, because collecting in the wrong places is as much of a problem as missing the right ones. You collect tax where you have nexus, which means a physical presence such as premises, staff or inventory or enough sales in a state to cross its economic threshold. Mapping your obligations is part of knowing how to calculate sales tax for each place you sell into. The steps below assume your store is already live, so if you are still working out how to start an online store, set that up first.
01. Work out where you have nexus
Start by mapping every place your sales create a tax duty, because you can only collect correctly once you know where you owe. Physical nexus comes from having premises, staff or stored stock in a state, including inventory sitting in a third-party warehouse. Economic nexus is triggered when your revenue or order count in a state passes its threshold. Write down each state where either applies, since that list decides where you switch collection on in the next steps.
Did you know? As your business expands into new regions, managing tax compliance can become more complex. Wix supports global and omnichannel eCommerce with multilingual storefronts, multi-currency payments, marketplace and social selling, mobile apps and integrated point-of-sale systems for online and offline sales.
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02. Choose an automated sales tax tool
Pick software that calculates rates accurately, supports the channels you sell through and helps with reporting and filing. A small store usually wants something quick to switch on with very little setup. A larger multi-state seller needs deeper reporting, audit-ready records and filing support. Match the tool to how complex your sales footprint really is, rather than paying for enterprise features you will never touch or outgrowing a basic tool in a season.
03. Connect the tool and add your tax regions
Connect the tool to your store so it can read your orders, then switch on collection for every region from your nexus list. This step tells the system which states and countries to charge tax in. Once it is set, the correct rate is applied automatically from the first order onward, with no manual entry per sale and no spreadsheet of rates to maintain on the side.
04. Set your product tax categories
Products are not all taxed the same way. Clothing, digital downloads, groceries and subscriptions can each carry different rates or full exemptions depending on the state. Assign the right tax category to every product so the software applies the correct treatment instead of a single flat rate across your catalog. This is where a lot of quiet errors creep in, especially for stores with a wide mix of items, so it is worth a careful pass.
One thing worth knowing: if your catalog spans many product types with different tax treatment, like clothing, digital goods and groceries, plan for extra setup time to categorize them correctly. A simple catalog can be done in minutes. A wide, mixed catalog is closer to an afternoon.
05. Collect the right tax at checkout
With your regions and product categories set, collection runs automatically on every order. You do not work out anything per sale and you do not chase rate changes, the tool handles both. Your job shifts to spot-checking that the right tax is showing on orders and keeping your details current.
06. Review your reports and file on time
Collecting tax is only half the job, since the money you collect has to reach each jurisdiction. Use the tool's reports to see what you owe where, then file and remit before each deadline to avoid penalties and interest. Some tools offer filing as a managed service to save the admin, though you stay responsible for registration in each state and for remittance unless you specifically sign up for that service.
Filing on time is the last piece, and it is also where selling in more places means owing in more places. Keeping tax where you already run your store is what makes that manageable.
How Wix automates sales tax for your store
Wix runs that whole process inside your store dashboard, powered by its built-in Avalara integration. You set it up once and it works across your eCommerce features, from the product catalog through to checkout. The walkthrough below is five steps.
Open your dashboard, go to Settings and select Store Tax. Wix gives you two ways to collect, manual rates you enter yourself or automated tax through Avalara and this walkthrough uses the automated route so you are not maintaining rate tables by hand. Tax lives in the same place as the rest of your store. Wix is an all-in-one eCommerce platform that supports physical products, services, specialized business models like rentals or online ordering and digital programs such as online courses, all from a single backend.
Click Get Automated Tax to switch on the Avalara-powered calculator. Automated tax runs on a Premium or Studio plan that supports it and covers most regions, though it is not available in Brazil or India. Switching it on early means your store can charge correctly from its very first order.
Set up Avalara with your personal details and business address. Avalara uses that address to validate locations and apply the right jurisdiction rules to each sale, which is why accuracy here matters. Tax then runs inside the same flow as the rest of your store rather than as a bolt-on.
Add the states and countries where you need to collect. Avalara applies the correct rate for each location you add, including VAT and GST abroad and updates on its own when a rate changes. That makes it practical to collect correctly across many places at once.
Choose whether tax is added at checkout or included in the product price. Either way, the total tax for the order is shown at checkout so the buyer knows the full amount before they pay. You can also group products that are taxed differently, like digital goods, so each is handled correctly. How tax appears is part of the checkout you control. Wix supports high-performance eCommerce operations with AI product recommendations, automated eCommerce discount logic, abandoned cart recovery and customizable checkout workflows.
"I've been a long-time Wix customer. It's given me the tools, the resources and the knowledge that there is no way that I would have been able to figure out on my own." — Tammy Maki, Founder & CEO, Raven Rising
Showing the right number at checkout is not only compliance, it is conversion. Tax is collected the same way whether you sell online or through your point of sale, sitting right alongside how you accept payments. Wix offers POS tools to take payments online and in-person. A single tax setup then covers your website and your counter at once.
With tax running quietly in the background, you can put your attention back on eCommerce marketing and the everyday work of bringing in more orders, instead of checking whether each sale was taxed correctly.
Learn more: What is a POS?
How to use automated sales tax for eCommerce FAQ
What is the economic nexus and how does it affect my online business?
Economic nexus is a tax duty that kicks in when your sales into a state pass its threshold, even with no physical presence there. Thresholds vary by state and commonly sit around $100,000 in sales or 200 transactions, though some differ, for example New York uses $500,000 and 100 transactions. Once you cross it, you have to register, collect and remit in that state.
How does automated sales tax calculation work?
The software reads the buyer's address at checkout, finds the correct jurisdiction rate and applies the product's tax category, then calculates the tax in real time. It draws on a constantly updated rate database, so you do not have to track rate changes by hand or guess at local rules.
Do online marketplaces collect sales tax for me?
Often yes. Under marketplace facilitator laws, marketplaces such as Amazon, Etsy and Walmart usually collect and remit tax on the sales made through them. Sales through your own store are still your responsibility and your marketplace sales can still count toward your nexus in a state, so keep tracking them.
What is the difference between physical and economic nexus?
Physical nexus comes from a real presence in a state, such as premises, staff or stored inventory. Economic nexus comes from crossing a state's sales or transaction threshold. A business can have both at the same time and each one creates its own duty to collect and remit.
Does automated sales tax software file my returns for me?
Not automatically. Most tools calculate and collect accurately and produce filing-ready reports. Some offer filing as a paid service, but you stay responsible for registration and remittance unless you enroll in that service. This is general information, not tax advice, so check with a professional for your own situation.
