Brandon Roth
Head of Product Marketing
In this article
You started your Shopify store to build something. A brand people love, products that sell, a business that keeps growing. Somewhere along the way, sales tax showed up uninvited.
New states to register in. Filing deadlines on different calendars. Marketplace orders, refunds, subscriptions, and exchanges that all count differently. It's work that never ends, and it's work that never moves your business forward.
That's the work Zamp takes off your plate, completely. Zamp has been chosen as Shopify's preferred partner for fully managed sales tax, and more than 1,000 Shopify merchants, including Everyday Dose, TUSHY, Oats Overnight, Cult Gaia, and David Protein, already trust us to handle it. Here's how it works.
It starts with an integration built for how you actually sell.
When you connect your Shopify store to Zamp, we import your full order history and keep syncing from there. Every time an order changes, Zamp picks it up within minutes. New orders, refunds, cancellations, and edits all flow in automatically, with nothing to export and nothing to upload.
Zamp works with the data you already keep in Shopify. Your products are mapped to the right tax treatment using Shopify's own product categories, so a hoodie is treated as clothing and a protein bar as food in every state you sell into. There's no second catalog to maintain and no tax codes to enter by hand.
From every order, Zamp captures what the states care about: what was sold, where it shipped from and to, which channel it came through, what was discounted or refunded, and whether the buyer was tax exempt. Gift cards, tips, delivery fees, tax-inclusive pricing, and in-store POS sales are all handled correctly, so the edge cases never land on your desk.
Refunds, returns, and exchanges, handled the way states expect.
Returns are part of running a store, and they shouldn't make your sales tax messy. Zamp records every refund as its own credit on the day it happened, scales the tax back on partial refunds, credits refunded shipping, and accounts for restocking fees charged through Shopify Returns. Your numbers reconcile, and you never have to fix them by hand.
Multi-channel, without the double counting.
Most Shopify merchants sell in more than one place. When a marketplace like Amazon, TikTok Shop, Walmart, eBay, Etsy, or Target Plus collects and remits the tax, you still report the sale, but you don't owe the tax. Zamp recognizes those orders automatically and treats them correctly, so you see one complete picture of your sales and your obligations across every channel.
That same complete picture is how Zamp tracks economic nexus as you grow. When you're approaching a new state's threshold, we see it coming, and we handle the registration.
“Working with Zamp has simplified our processes across multi-channel sellers.” Christian Rivera, Founder and CEO, The Ecommerce Accountants
Built for the apps in your stack.
Your Shopify store runs on more than Shopify. Returns apps, subscription platforms, and upsell tools all change what an order looks like, adding exchanges, partial refunds, restocking fees, and recurring charges. Zamp handles those nuances directly in your Shopify order data. Whether you use Loop for returns and exchanges, Recharge for subscriptions, or just about any other returns, refunds, or recurring billing app in the Shopify App Store, every order is captured correctly and your sales tax stays accurate no matter how your customers buy.
The integration is the start. Owning the outcome is the point.
Clean data is the foundation. What sets Zamp apart is what happens next. Zamp's team of tax experts, backed by AI agents, takes on the work from end to end:
- A Sales Tax Health Check covering nexus, taxability, and anything outstanding
- State registrations wherever you need them
- Filing and remittance in every state, including local returns in home rule states like Colorado and Alaska
- Notice management, so letters from the state come to us, not to you
- Reporting and data archival for a complete audit trail
- Dedicated onboarding and account management, with phone and email support
Zamp also checks the tax you collected against what you owed and flags any gaps early, before they become a problem on a return. And we stand behind all of it with the Zamp Commitment, our accuracy and filing guarantee. We own the outcome with the states, so you don't have to.
“It was a breath of fresh air to have a partner that lives and breathes sales tax. That's all they do. They hire amazing, almost PhD-level people.” Christian Rivera, Founder and CEO, The Ecommerce Accountants
Zamp grows with you.
Whether you're filing in one state today or 30 states next year, Zamp scales with your business. New channel? New market? New state? We're already on it. Our engineers keep improving the Shopify integration too, so new ways of selling are supported as your store evolves.
That's what fully managed means. You focus on products, customers, and growth. We handle sales tax, and you sleep better at night knowing it's done right.
Right now, Shopify merchants can switch to Zamp and get three free months of fully managed sales tax, starting from the day their service is activated. Sign up by January 31, 2027 to lock in the offer, then choose any onboarding date that works for you through January 31, 2027.
Ready to take sales tax off your plate for good? See how Zamp works for Shopify merchants.
