The fully managed sales tax platform for e-commerce and retail.
We manage sales tax across all your sales channels—DTC, marketplaces, and wholesale.
Trusted by finance and accounting teams at
How Zamp helps e-commerce brands.
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.
Accurate product taxability.
Automatically applied as your catalog evolves—across states, product types, and edge cases.
Rooftop-accurate calculations.
Real-time tax calculations that match checkout, accounting, and filings—down to the exact address.
Automated registrations and filings.
Stay compliant across the U.S. and Canada—without tracking thresholds or deadlines.
White-glove expert support.
Direct access to U.S. and Canada sales tax experts, including former state auditors.
Simple, predictable pricing.
Clear, all-inclusive pricing with no surprise charges as you scale.
Integrations built for where you sell.
Connect to leading ERP, billing, and e-commerce platforms — and support custom tech stacks via our API.
“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.”
FAQs.
Still have questions? Call us at 1-866-438-9267 or email us at support@zamp.com.
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.