QX Labs
All integrations
Taxjar
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Finance

Let agents handle your sales tax in TaxJar

QX calculates tax, files transactions, validates exemptions and reconciles refunds—so finance stops chasing rates and starts closing the books faster.

@QX Are we exposed in any new states this month?
QX
October sales pushed you over the $100k economic nexus threshold in Illinois and Pennsylvania. Neither is registered in TaxJar yet. Shall I draft a registration brief for your accountant?
TaxJar
TaxJar
Shopify
Shopify
QuickBooks
QuickBooks

Stop hand-calculating tax, copy-pasting orders, and chasing exemption certificates. Hand it to an agent.

Calculations

Accurate tax on every order

Agents pull the right rate for every zip, line item and shipping address—applying product categories and nexus rules automatically, so no order ships with the wrong tax attached.

Filing prep

Books that reconcile themselves

Orders and refunds flow into TaxJar as they happen, with mismatches flagged before filing. Month-end stops being a scramble through spreadsheets and storefront exports.

Exemptions

Validate every tax-exempt sale

VAT numbers and resale certificates get checked the moment an order lands—exempt customers tagged in TaxJar, invalid claims escalated, and your audit trail kept clean.

TaxJar

Real workflows, built for your team

Build complex workflows in minutes that chain TaxJar together with the rest of your stack. Trigger them on specific events, on schedule, or on demand.

E-commerce: Tax every order correctly, the moment it's placed

New order placed

New order placed

Triggered in Shopify

QX Labs Icon

Resolve products to tax categories

Agent step

Taxjar

Calculate sales tax

in TaxJar

Tax applied
Taxjar

Create order transaction

in TaxJar

Rate outside expected range
Flag unusual rate to finance

Flag unusual rate to finance

Alert via Slack

QX agents can calculate tax, file order and refund transactions, validate exemptions—and a lot more

QUERYCalculate sales tax on an order
CREATECreate an order transaction
CREATECreate a refund transaction
UPDATEUpdate an order transaction
LISTList orders and refunds
QUERYShow tax rates for a location
LISTList nexus regions and tax categories
QUERYValidate a VAT number

+ 10 more actions

About Taxjar

TaxJar, owned by Stripe, is a leading sales tax automation platform used by tens of thousands of e-commerce sellers and finance teams. Its API delivers real-time rate calculations, nexus tracking and filing-ready reports across every US state and dozens of countries—making it a natural backbone for automated tax compliance.

About QX Labs

QX is an AI agent platform that helps you build, run and scale AI across your team in a few clicks. Create agents that connect to your data and 1,000+ apps, building institutional memory that gets sharper every run. Then delegate tasks to them from where you already work—Slack, Teams, WhatsApp or email.

See TaxJar working inside your stack

Want an AI co-worker that keeps your sales tax accurate and your books reconciled? Book a demo call to discuss your use cases, or get started for free.

Book a demo