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ZTax Accountants · Houston & remote support
Ecommerce Sales Tax Support
Online sellers need to distinguish marketplace-collected tax from their own direct sales and reporting obligations. ZTax helps organize sales data and review the jurisdictions that need attention.
Connect channels, destinations and filing records.
An agreed scope. Organized records. Practical next steps.
How we help
Connect channels, destinations and filing records.
Separate sales channels
Identify marketplace transactions, storefront sales and any other direct activity.
Review location information
Collect destination reports, inventory locations and business presence for the applicable analysis.
Reconcile reporting data
Match tax collection reports, returns and payments so discrepancies can be investigated.
Prepare for the conversation
The records that help us start.
Complete source records help us understand the work and avoid assumptions. We’ll confirm the relevant periods, access and any missing information before agreeing a schedule. Historical corrections, additional entities and extra jurisdictions may change the scope.
Your starting checklist
- Channel sales reports
- Marketplace tax reports
- Destination sales data
- Registrations and filing history
Answers before we begin
Ecommerce Sales Tax Support: common questions.
Is marketplace collection enough for every sale?
No. Direct sales may be treated differently, and state rules vary. A marketplace’s collection does not automatically resolve every obligation.
Does this calculator tell me my nexus?
No. The sales-tax calculator applies a rate you enter. It cannot determine registration, taxability or sourcing rules.
Why keep marketplace reports?
They support reconciliation and help distinguish amounts collected by the platform from amounts the business may need to report or remit.
Your next step
Let’s put your numbers in context.
Tell us what you need help with and the period involved. We’ll discuss the records, scope and pricing before work begins. Please keep sensitive tax identifiers out of your initial enquiry.
Connected support.
Explore the main service ↗Use our free business calculators ↗Service information reviewed October 20, 2026. Work is subject to an agreed engagement and available records. General information is not a determination of your tax or legal position.
A clearer next step
Connect your sales channels and tax records.