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E-Commerce & D2C
Multi-state sales tax, international VAT on cross-border orders, marketplace facilitator compliance
Sales Tax & VAT Registration, Filing & Compliance for Small & Medium Businesses
Registration, calculation and filing for growing businesses, the compliance work handled without hiring a tax team.
Economic nexus monitoring and alerts, real-time tax calculation, product taxability, exemption certificates, and multi-state and multi-country filing on one platform. Customer tax IDs verified before you invoice. Live in days, not months.
- 150+Tax Jurisdictions
- 50US States + DC
- 130+Countries TIN
- Real-TimeCalculation
- AutomatedFiling
- E-Commerce Sellers
- D2C Brands
- Cross-Border Sellers
- Retail
- Wholesale
- Service Businesses
Built For
From First Nexus Threshold to Global Expansion
Whether you are an e-commerce seller triggering your first state nexus, a D2C brand shipping internationally, or a wholesale distributor managing exemption certificates — the OS handles the compliance your growth creates.
Retail & Wholesale
Exemption certificate management, multi-location compliance, reseller validation, B2B tax treatment
Cross-Border & Services
EU VAT, UK VAT, GST, reverse charge determination, TIN verification, e-invoicing for B2B transactions
The Tax Landscape for SMBs
Growth Creates Tax Obligations Everywhere
Every new state you sell into, every international order you fulfil, every B2B invoice you send — creates a tax obligation. The compliance burden scales faster than the revenue that triggers it.
US Sales Tax Nexus
After the Wayfair decision, selling into a state — even without a warehouse or office there — triggers collection and filing obligations once you cross that state's economic nexus threshold. Fifty states, fifty sets of rules, rates, and exemptions. Most SMBs discover they have obligations in states they have never registered in — and the penalties for non-collection are retroactive. A voluntary disclosure agreement can limit the look-back.
- Economic Nexus
- Wayfair
- 50 States
- Multi-Rate
International VAT & GST
Selling to EU customers triggers VAT obligations — even for small sellers. The One Stop Shop simplifies registration, but compliance logic (rates, thresholds, reverse charge) remains complex. GST applies in Australia, India, Singapore, Canada, and elsewhere. Each regime has registration thresholds, filing frequencies, and penalty structures cross-border businesses must track.
- EU VAT
- OSS / IOSS
- GST
- Reverse Charge
E-Invoicing Requirements
Mandatory e-invoicing is expanding rapidly — Italy, India, Saudi Arabia, France (2026), Germany (2026), and more jurisdictions every year. Even small businesses that sell B2B into these markets must generate compliant structured invoices or risk rejected payments.
- Peppol
- CTC Models
- Structured Data
- B2B Mandate
How It Works
Connect. Calculate. File. Done.
TaxDo connects to the systems you already use, handles the tax logic in real time, and files on your behalf — so you focus on selling, not on compliance spreadsheets.
1Connect Your Systems
Link your e-commerce platform, ERP, or accounting software through pre-built integrations. TaxDo ingests your transaction data and begins monitoring immediately — no manual data entry, no migration project.
- Shopify
- WooCommerce
- Xero
- API
- BigCommerce
- QuickBooks
2Calculate & Validate
The Indirect Tax engine determines the correct rate at checkout — across US states, EU VAT, and global GST. The Tax Identity engine verifies customer TINs and exemption status in real time, ensuring the right tax treatment on every transaction.
3File & Stay Compliant
TaxDo generates returns, files with each authority on schedule, and maintains a complete audit trail. Nexus alerts notify you before new obligations trigger. You grow — the OS handles the compliance that growth creates.
Your TaxDo Configuration
Two Engines. One Platform Full Coverage
Growing businesses primarily need indirect tax compliance — but accurate tax treatment depends on verified identity data. Both engines work together natively inside the OS.
Primary Engine
Global Indirect Tax
US Sales Tax, VAT, and GST — from rate determination to return filing. The engine that handles your transaction tax obligations across every jurisdiction where you sell.
- Real-time tax calculation at point of sale
- Economic nexus monitoring across 50 US states
- Multi-jurisdictional VAT & GST determination
- Automated return generation and filing
- Exemption certificate lifecycle management
- E-invoicing compliance and structured output
Supporting Engine
Global Tax Identity
Verified identity data that powers correct tax treatment. TIN validation, VAT number verification, and exemption status checks — ensuring every transaction is taxed correctly from the start.
- Customer TIN verification across 130+ countries
- EU VAT number validation (VIES integration)
- B2B buyer status confirmation for reverse charge
- Exemption certificate validation and storage
- Real-time identity checks at point of onboarding
Key Capabilities
Built for the Way Growing Businesses Operate
Every capability designed for businesses that are scaling into new markets, adding sales channels, and managing compliance with lean teams.
Customer Tax ID Verification
Real-time validation of customer Tax Identification Numbers against 130+ country registries. Confirms VAT registration status for B2B transactions, enabling correct reverse charge treatment and preventing incorrect tax collection. Integrates with EU VIES and jurisdiction-specific validation services.
Audit-Ready Records
Transaction-level audit trails from day one — every calculation includes the rate applied, jurisdiction matched, product classification used, and exemption applied. Historical rate lookups, filing confirmations, and certificate archives provide complete documentary evidence when a tax authority sends a notice, with tax notice management for the response.
Product Taxability Rules
Tax rules vary by product type and jurisdiction. Food and groceries are exempt in most US states but taxable in others. Clothing is exempt in some states. Digital goods, SaaS subscriptions, and services follow different rules. TaxDo classifies products against jurisdiction-specific taxability matrices, so you collect the right tax automatically.
Nexus Monitoring & Alerts
Continuous tracking of your sales against every US state's economic nexus threshold — revenue and transaction count. Alerts trigger before you cross, giving you time to register and begin collecting rather than discovering obligations in an audit notice. Dashboard shows exposure by state with projected threshold dates.
Real-Time Tax Calculation
Sub-second tax determination at checkout — evaluating jurisdiction, product classification, buyer status, and applicable exemptions. Handles overlapping US jurisdictions (state, county, city, district), multi-rate VAT structures, and GST regimes. Rate tables update automatically as tax authorities publish changes.
Multi-State & Multi-Country Filing
Automated return preparation and filing across every jurisdiction where you have obligations. US sales tax returns, EU VAT returns, GST filings — generated from your transaction data, filed on schedule, with confirmation tracking. Filing calendar tracks every deadline so nothing slips.
Exemption Certificate Management
Automated collection, validation, and storage of exemption certificates from wholesale buyers, resellers, and tax-exempt organizations. Tracks expiry dates, prompts buyer renewal automatically, and applies valid exemptions at point of sale — so you never under-collect or over-collect tax on exempt transactions.
Why an Operating System
Tax Compliance Is Not a Point Solution Problem
Growing businesses accumulate tax obligations across regimes — US sales tax in new states, VAT when you sell internationally, TIN verification for B2B buyers. An operating system means you never outgrow your compliance infrastructure.
One Integration, All Obligations
Connect your systems once. As you expand into new states, new countries, and new tax regimes, the OS handles each obligation without additional integrations, migrations, or vendor evaluations. The integration you build today serves every obligation you trigger tomorrow.
Identity Powers Accuracy
Correct tax treatment depends on verified identity — is the buyer a reseller? Is their VAT number valid? Are they exempt? Because Tax Identity and Indirect Tax share the same platform, identity verification feeds directly into tax calculation. No manual lookups, no data gaps between systems.
Built for the Growth Trajectory
Start with US Sales Tax today. Add EU VAT when you sell internationally. Activate Tax Transparency if regulatory reporting applies. Each engine activates on the platform you already run — same data, same dashboard, same team. Your compliance infrastructure scales as fast as your revenue.
TaxDo Cloud
Built for SMB Speed Not Enterprise Timelines
TaxDo Cloud is the fastest path to tax compliance — SaaS deployment, pre-built integrations, and usage-based pricing. No infrastructure to manage, no IT project to scope.
Days, Not Months
Connect your e-commerce platform, accounting system, or ERP through pre-built integrations. Configure product tax classifications with guided setup. Most SMB deployments go live within a week.
Scales With Revenue
Usage-based pricing means your compliance cost tracks your growth. Selling into 5 states today and 30 next quarter? The platform expands automatically — no upgrade conversations, no re-contracting.
Zero Infrastructure
No servers to provision, no software to install, no maintenance windows. TaxDo Cloud runs in the background — rate tables update automatically, filing deadlines are tracked, and jurisdiction changes propagate without action from your team.
SMB Owners & Accountants Tax FAQ
Questions from Compliance Teams
We will respond to you at any time.
Just use our help center or contact us.
Yes. Since the 2018 South Dakota v. Wayfair Supreme Court decision, states can require businesses to collect and remit sales tax based on economic nexus — meaning revenue or transaction volume thresholds — even without physical presence. Each state sets its own thresholds. TaxDo monitors your sales against every state's threshold in real time and alerts you the moment you trigger an obligation.
TaxDo connects to your e-commerce platform and handles tax compliance end-to-end: monitoring nexus thresholds across all 50 US states, calculating the correct tax at checkout based on product type and destination, managing exemption certificates for B2B buyers, generating and filing returns in every state where you have obligations, and maintaining audit-ready transaction records.
When you sell to customers in the EU, UK, Australia, or other VAT/GST jurisdictions, new tax obligations apply. TaxDo's Indirect Tax engine covers VAT and GST alongside US Sales Tax from the same platform — determining the correct tax treatment, handling registration requirements like EU One Stop Shop (OSS), and filing returns in each jurisdiction. No new vendor or integration required.
TaxDo Cloud is built for growing businesses — SaaS deployment with usage-based pricing that scales with your transaction volume. No upfront infrastructure cost, no long implementation cycles. You connect your systems, and the OS handles compliance from day one. Contact our team for pricing specific to your business.
Yes. TaxDo automates the full exemption certificate lifecycle: collecting certificates from buyers, validating completeness and accuracy, tracking expiry dates, and auto-applying valid exemptions at the point of sale. When a certificate expires or is missing, the system flags it and can prompt the buyer for renewal — so you never under-collect or over-collect tax.
Economic nexus is the threshold at which a state requires you to collect sales tax based on your revenue or transaction count in that state — regardless of physical presence. Thresholds vary by state (commonly $100,000 in revenue or 200 transactions). TaxDo tracks your sales against every state's threshold continuously and sends alerts before you cross, giving you time to register and begin collecting.
For B2B sales — especially cross-border — validating customer TINs and VAT registration numbers is essential for applying the correct tax treatment (zero-rating, reverse charge, exemptions). TaxDo's Tax Identity engine verifies TINs against 130+ country registries in real time, ensuring you apply the right rate and maintain the documentation needed for audits.
TaxDo Cloud is designed for fast deployment. Connect your e-commerce platform, ERP, or accounting system through pre-built integrations, configure your product tax classifications, and the OS begins monitoring nexus, calculating tax, and preparing filings. Most SMB deployments are operational within days, not months.
Marketplace facilitator laws in most US states require the marketplace — Amazon, Etsy, Walmart, eBay — to collect and remit sales tax on your behalf for sales made through their platform. However, you remain responsible for sales tax on your direct sales (your own website, in-person, wholesale). TaxDo handles your direct-sale obligations — calculating tax, filing returns, and tracking nexus — while you let the marketplace handle what they're legally required to.
Part of the TaxDo OS
One Platform Every Tax Obligation
Your indirect tax compliance runs on the same operating system that handles tax identity verification and tax transparency reporting. When your obligations expand, the OS is already there.
Engine 1
Global Tax Identity
Engine 1TIN validation, business registry verification, and identity intelligence across 130+ countries. The verified identity layer that powers correct tax treatment on every transaction.
Engine 2
Global Indirect Tax
Engine 2US Sales Tax, VAT, and GST across 150+ jurisdictions. Real-time calculation, nexus monitoring, registration management, automated filing, and audit defence.
Engine 3
Regulatory Compliance
Engine 3CRS 2.0, DAC8, CARF, DAC7, and FATCA — forensic intelligence, automated curing, and regulatory reporting. When transparency obligations apply, the engine activates on the platform you already run.
Tax Compliance That Grows With You Not Against You
US Sales Tax, VAT, GST — nexus monitoring, real-time calculation, automated filing and audit-ready records. One platform. Operational in days.