We manage sales tax across all your sales channels—DTC, marketplaces, and wholesale.
Thousands of businesses already switched to Zamp.
Z-Tax by Zamp combines innovative software with expert service to help accounting practices, fractional CFOs, SALT professionals, and CPA firms offer complete sales tax services to their clients.
Automatically applied as your catalog evolves—across states, product types, and edge cases.
Explore sales tax calculation| Product | Category | State | Taxability |
|---|---|---|---|
| Trail runnerSKU TR-9 · 212 variants | Footwear | TX | MappingTaxable |
| Protein barSKU PB-12 | Food | IL | MappingReduced |
| Gift cardSKU GC-50 | Stored value | CA | MappingExempt |
| Kids jacketSKU KJ-4 | Clothing | PA | MappingExempt |
Real-time tax calculations that match checkout, accounting, and filings—down to the exact address.
Explore Shopify integration233 S Wacker Dr, Chicago · rooftop rate
10.50%
Geocoded to the rooftop, not the ZIP code
Stay compliant across the U.S. and Canada—without tracking thresholds or deadlines.
Explore filing and remittanceDirect access to U.S. and Canada sales tax experts, including former state auditors.
Explore the managed service
Your specialistZampOnlineClear, all-inclusive pricing with no surprise charges as you scale.
Explore pricingWhat’s included
Bring your states and systems. A sales tax specialist will show you exactly what Zamp takes over.
Connect to leading ERP, billing, and e-commerce platforms — and support custom tech stacks via our API.
ShopifyOrders and refunds
NetSuiteInvoices
StripeSubscriptions
WooCommerceOrders
XeroInvoices
Zamp is exactly what we were looking for. When you pay for something, you expect those people to provide the value they promised—and Zamp goes above and beyond.
Yes. When you sell through Amazon FBA or Walmart Marketplace, they collect and remit tax in most states. Zamp automatically identifies these transactions, excludes them from your filing obligations, but tracks them for nexus monitoring. You file correctly without double-paying or missing obligations.
Absolutely. We monitor all locations where inventory creates physical presence—FBA warehouses, third-party logistics providers, drop shippers. You’ll know about nexus obligations before they become penalties.
Yes, we support many Shopify Plus merchants processing millions in revenue. Our infrastructure handles complex tax rules and peak transaction volumes without impacting site performance or checkout speed.
We handle it all. Exemption certificates, resale certificates, multi-location drop shipping—everything managed in one platform. Upload certificates once, apply them automatically forever.
Yes. We regularly help brands recover lost logins, clean up state registrations, and file back returns to get you current. Where VDAs are needed, we connect you with the right resources. Most situations can be resolved favorably when addressed proactively.
Talk to a sales tax specialist about your states, your systems and what we take over.
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