Tax compliance automation
Avalara integration services
Avalara integration that eliminates tax compliance risk across every sales channel
Your store collects tax every day. Without a properly configured Avalara integration, you are filing based on guesswork. We connect Avalara to your enterprise resource planning, ecommerce platform, and marketplace stack so tax calculation, exemption management, and returns filing happen automatically.
Submit brief → call within 48 hours → scoped proposal in 3 days → Sprint 1 within 1 week of sign-off
0
Tax jurisdictions in the US alone
0
Avalara tax calculation accuracy rate
0
From brief to scoped integration proposal
What your Avalara integration handles
Real-time tax calculation at checkout and invoice
Exemption certificate management and validation
Automated returns filing across all nexus states
Enterprise resource planning to Avalara sync for all transaction types
The real cost of manual tax compliance
Manual tax compliance fails the moment you cross a second state line
"We had nexus in 9 states and were calculating tax manually in our enterprise resource planning. When the audit came, we had undercollected by more than $200K in two years. The Avalara integration paid for itself in the first month."
Director of Finance, Multi-state direct-to-consumer brand
Verified client, name withheld per NDA
$0
Average underpayment discovered in a multi-state audit
0
States with economic nexus laws post-Wayfair
0
Hours per month spent on manual tax reconciliation for a 1,000-order-per-month store
Cost of tax non-compliance
Every day without Avalara integration is a day of untracked liability
Use your annual revenue to see how much tax liability accumulates while your team handles compliance manually. These figures reflect average audit exposure and penalty rates for multi-state sellers.
$5M
$1M$25M$50M
12 states
12550
Calculation basis
Average tax undercollection rate1.2% of revenue
State penalty rate (average)10% of underpaid tax
Manual compliance labor cost8 hours per state per month at $65 per hour
Exemption certificate error rate14% industry average
Estimated annual compliance liability accumulating
$0
per year in untracked exposure, labor, and penalties
Audit exposure risk$0
Manual labor cost$0
Penalty exposure$0
Avalara integration eliminates this exposure
Accurate calculation at checkout, automated returns filing, and exemption certificate validation running 24/7. Most integrations go live in under 28 days.
Avalara ecommerce integration capabilities
Everything your Avalara connector needs to do
A working Avalara API integration does more than route tax calls. It manages exemptions, syncs transaction history, handles credit memos and refunds, and keeps your returns data current across every platform your business runs on.
Real-time tax calculation at every transaction event
Every checkout, invoice, order amendment, credit memo, and return triggers an AvaTax API call. Rates reflect the exact ship-to address, product taxability rules, and buyer exemption status in real time.
AvaTax APIAddress validationProduct taxability
POST /api/v2/transactions/create
ship_toAustin, TX 78701
amount$1,249.00
tax_codeP0000000
tax_calculated$102.43
response_ms47ms
Exemption certificate management
Business-to-business buyers need zero-tax transactions. We wire Avalara's CertCapture into your checkout and enterprise resource planning so certificates are collected, validated, and applied automatically at the line-item level.
Acme CorpValid
Blue Ridge LLCValid
Horizon ManufacturingExpiring 30d
Summit ToolsRequest sent
Total certs247
Automated returns filing via Avalara Returns
Transaction data flows from your systems into Avalara Returns automatically. Filings go out on schedule across all nexus states with no manual data entry from your finance team.
50
state filings automated
$0
manual entry per filing
Enterprise resource planning and ecommerce platform sync
Orders, invoices, credit memos, and refunds all write back to Avalara in real time. Platforms supported: NetSuite, SAP, Dynamics, BigCommerce, Shopify, Magento, and custom APIs.
NetSuiteBigCommerceSAPShopify
Avalara API integration architecture
Built on Avalara's native APIs, not a third-party wrapper
Generic connectors wrap Avalara's REST API behind a middleware layer that breaks on version updates and cannot handle transaction edge cases. We build directly against AvaTax, CertCapture, and Returns endpoints so your tax data is always accurate and always current.
Transaction layer
CreateTransaction42ms
CommitTransaction18ms
AdjustTransactionProcessing
VoidTransaction31ms
Certificate layer
CertCapture.createCert
CertCapture.validateCert
CertCapture.listExemptions
TaxProfile.getCustomer
Returns layer
Returns.getFilingStatus
TX FiledCA Filed
Returns.approveFiling
Auto-approve below threshold
Returns.getWorksheet
Live reconciliation data
Supported source systems
Enterprise Resource Planning
NetSuite
Microsoft Dynamics
SAP Business One and S/4
Odoo
Ecommerce
BigCommerce
Shopify
Adobe Commerce
Headless / API
Marketplaces
Amazon
eBay
Walmart
TikTok Shop
Finance
QuickBooks
Xero
Sage
Custom general ledger
Proof · Annie's Annuals and Perennials
Avalara tax setup delivered as part of a full ecommerce migration
Brand
Annie's Annuals
California nursery / direct-to-consumerEstablished nursery migrating from legacy PHP ecommerce to headless architecture with Avalara tax compliance built in from day one.
Challenge
Legacy platform had no automated tax calculation. Seasonal traffic spikes required a tax setup that could scale without manual intervention during peak periods.
Avalara deliverable
Avalara tax setup configured for California multi-county rules
Gift card tax treatment via API automation
Scalable for seasonal 10x traffic spikes
Result
0%
automated tax calculation from launch day
The headless platform launched with Avalara fully integrated. Zero manual tax entry during seasonal peaks. Compliance maintained at scale.
Why Redefine for Avalara integration
Three things that separate a tax integration from a tax incident
01
Tax-domain knowledge, not just API access
Most integration teams treat Avalara as a REST endpoint to POST transactions to. We understand Avalara's tax content engine, nexus determination logic, and the product taxability rules that cause silent errors in generic implementations.
Nexus determinationProduct taxability codesTax content updates
02
Edge-case handling built in from day one
Partial refunds, bundled products, international value-added tax, digital goods, subscription billing, and marketplace facilitator laws all create edge cases that break basic integrations. We map and handle these during scoping before code is written.
Partial refund handlingBundled product rulesMarketplace facilitator
03
Scoped proposal before you commit anything
Submit your system map and we send a line-by-line proposal in 3 business days covering the integration build, data mapping, testing plan, and maintenance terms. You see the full scope before approving a dollar of spend.
Line-by-line pricingFull scope before commitmentProposal in 3 days
Frequently asked questions
Questions before you scope your Avalara integration
No. We build directly against Avalara's REST API so your source system only needs to provide order data. If your enterprise resource planning or ecommerce platform has an API, we can route transactions to Avalara regardless of whether it has a native Avalara connector.
Single-platform Avalara integrations typically go live in 14 to 21 days from scope sign-off. Multi-platform stacks covering enterprise resource planning, ecommerce, and marketplace sources take 28 to 42 days. Exemption certificate management adds 7 to 10 days depending on your business-to-business customer volume.
Yes. Avalara's API accepts historical transaction imports. We scope this as a separate migration phase during the initial brief and handle data cleaning, format transformation, and batch upload. Historical data is important for accurate returns filing from day one.
Every integration we build includes fallback logic. If Avalara is unreachable, orders continue processing using your configured fallback rate until the connection restores. Queued transactions are automatically retried and committed once Avalara is back. You receive an alert when fallback mode activates.
Yes. Avalara's Global Tax Compliance module handles value-added tax, goods and services tax, and other international indirect taxes across 190 countries. We scope international requirements separately since threshold rules, invoice format requirements, and filing cadences differ significantly from United States sales tax. Flag your international sales volume in your brief and we will include it in the scoped proposal.
This is built for you if
You sell in 3 or more states and your finance team is manually reconciling sales tax data each month
You already have an Avalara account but your enterprise resource planning or ecommerce platform is not sending transactions to it reliably
You are growing into business-to-business sales and need exemption certificate management before your first wholesale customer places an order
Look elsewhere if
You sell only in a single state and your ecommerce platform's built-in tax calculation already handles that jurisdiction accurately
You need help signing up for an Avalara account or choosing a subscription tier; that conversation belongs with Avalara directly
Your system has no API and no way to export transaction data programmatically. Avalara integration requires a data source we can read from
Not sure? Tell us your situation and we will be straight with you.
Get your Avalara integration scoped
Tell us where your tax data breaks down today
Submit your brief. We review your system map and send a scoped proposal with line-by-line pricing, timeline, and full delivery plan, delivered in 3 business days. No commitment required to receive it.
Call within 48 hours
Scoped proposal in 3 days
Sprint 1 within 1 week of sign-off
Submit your Avalara integration brief
No commitment. No pitch. Just a scoped proposal.
Submit brief → call within 48 hours → proposal in 3 days → Sprint 1 within 1 week of sign-off
48 hours
First call
3 days
Proposal
14+ days
Fastest go-live
You own
All code
Brief received
We will review your tax compliance situation and send a scoped proposal within 3 business days. Expect a call from us within 48 hours.
Stop filing on guesswork. Get Avalara working across your entire stack.
No commitment. No pitch. A scoped proposal showing exactly what your Avalara integration costs, how long it takes, and what you get on go-live day.
Get Your Avalara Integration ScopedNo commitment. No pitch.
0
Days fastest go-live
$0
Cost for scoped proposal
0
Tax jurisdictions automated
48 hr
First call after brief