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US VAT & TaxJar Setup

UniBee supports automated US sales tax calculation and compliance through TaxJar integration. This system automatically calculates state, city, and county-level taxes based on precise address information.

Overview

UniBee’s US VAT system is powered by TaxJar and provides:
  • Automatic Tax Calculation: Real-time sales tax calculation based on customer address
  • Address Validation: Ensures accurate tax calculation through address verification
  • Multi-Level Taxation: Handles state, city, and county taxes automatically
  • Transaction Upload: Automatically uploads transactions to TaxJar for tax filing
  • Product Tax Codes: Supports different tax codes for different product types
  • Nexus Management: Only collects tax in states where you have a business presence

Why US VAT is Different

US sales tax differs from international VAT in several ways:
  • Multi-level taxes: State, city, and county taxes can stack
  • Address precision: Requires exact street address for accurate calculation
  • Nexus concept: Only collect tax in states where you have business presence
  • Product tax codes: Different products have different tax rules
  • Compliance reporting: Transactions must be uploaded for tax filing
Use this guide when you need to collect US sales tax, submit transactions to TaxJar, or keep checkout behavior compliant for US buyers.

Getting Started with TaxJar

Prerequisites

Before setting up TaxJar integration, you’ll need:
  1. TaxJar Account: Sign up at taxjar.com
  2. API Key: Get your API key from TaxJar dashboard
    • Production: Use for live transactions
    • Sandbox: Use for testing (free)
💡 Tip: Start with Sandbox API key for testing, then switch to Production when ready.

Step 1: Set Up TaxJar Gateway

Option A: Admin Portal Setup

  1. Go to Settings page in UniBee Admin Portal
  2. Navigate to VAT & TaxUS VAT Gateways
  3. Click Add Gateway
  4. Select TaxJar
  5. Paste your TaxJar API key
  6. Check Set as default if this is your primary gateway
  7. Click Save

Option B: API Setup

You can also set up TaxJar via API: Endpoint: POST /api/merchant/vat/setup_us_vat_gateway Request:
{
  "gatewayName": "TaxJar",
  "isDefault": true,
  "apiKeys": {
    "apiKey": "your_taxjar_api_key_here"
  }
}
Response: Gateway connection confirmed
Verify Setup: After setup, you can verify the connection by checking your merchant profile. The system will show your configured US VAT gateways.

Step 2: Configure Global US VAT Settings

After setting up TaxJar, configure your global US VAT defaults. These settings apply to all products and plans unless overridden.

Configuration Fields Explained

FieldRequiredWhat It Does
Active✅ YesMaster switch to enable/disable US VAT globally
Default Gateway✅ YesSelect TaxJar (or other enabled gateway)
Tax Code✅ YesProduct tax code (e.g., “40030” for SaaS, “31000” for Clothing)
From Address✅ YesYour business origin address (where goods/services ship from)
To Address⚠️ OptionalDefault destination (usually left empty to use customer address)
Nexus Addresses⚠️ OptionalStates/cities where you have business presence (required for tax collection)
Check Address Via Gateway⚠️ OptionalValidate all US addresses through TaxJar (recommended for accuracy)
Upload Invoice To Gateway⚠️ OptionalAutomatically upload transactions to TaxJar for tax filing (recommended)

Understanding Key Concepts

Tax Codes

Different products have different tax rates. Common tax codes include:
  • 40030: Software as a Service (SaaS)
  • 31000: Clothing
  • 20010: Digital Goods
  • 00000: Fully Taxable (general products)

Nexus Addresses

Nexus is your business presence in a state. You only need to collect tax in states where you have nexus. Common nexus triggers:
  • Physical location (office, warehouse)
  • Employees working in the state
  • Significant sales volume

Address Validation

Enabling address validation ensures accurate tax calculation by verifying customer addresses against official USPS databases.

Configuration Example

Admin Portal Configuration

  1. Go to SettingsVAT & TaxUS VAT Configuration
  2. Enable Active toggle
  3. Fill in the required fields:
    • From Address: Your business location
    • Tax Code: Select appropriate code for your products
    • Nexus Addresses: Add states where you have business presence
  4. Enable Check Address Via Gateway (recommended)
  5. Enable Upload Invoice To Gateway (for tax filing)
  6. Save configuration

API Configuration

Endpoint: POST /api/merchant/vat/setup_global_us_vat_config Example Request:
{
  "global_us_vat_config": {
    "active": true,
    "defaultGatewayName": "TaxJar",
    "taxCode": "40030",
    "fromAddress": {
      "countryCode": "US",
      "zipCode": "10001",
      "state": "NY",
      "city": "New York",
      "address": "123 Business St"
    },
    "nexusAddresses": [
      {
        "countryCode": "US",
        "zipCode": "10001",
        "state": "NY",
        "city": "New York",
        "address": ""
      }
    ],
    "checkAddressViaGateway": true,
    "uploadInvoiceToGateway": true
  }
}

Important Notes

  • Address Required: Once US VAT is active, US customers must provide a complete address for accurate tax calculation
  • Tax Recalculation: After address changes, tax amounts are automatically recalculated
  • Tax Code List: Fetch available tax codes using the category list API
  • Transaction Upload: Enabled transactions are automatically uploaded to TaxJar for compliance reporting

Step 3: Product & Plan-Level Configuration (Optional)

You can override global US VAT settings for specific products or plans. This is useful when:
  • Different products have different tax codes
  • Products ship from different locations
  • Some plans are US-only

Configuration Precedence

Settings are applied in this order (highest to lowest priority):
  1. Plan-level configuration
  2. Product-level configuration
  3. Global configuration

Product-Level Override

Override global settings for specific products: When to Use:
  • Product has different tax code
  • Product ships from different location
  • Product-specific tax rules

Plan-Level Override

Override global settings for specific plans: When to Use:
  • Plan is US-only (set sellOnUSOnly: true)
  • Plan has different shipping address
  • Plan-specific tax requirements

Configuration Fields

FieldRequiredDescription
Active✅ YesEnable this override (must be true to take effect)
Tax Code⚠️ OptionalOverride tax code for this product/plan
From Address⚠️ OptionalOverride shipping origin address
To Address⚠️ OptionalOverride destination address
Nexus Addresses⚠️ OptionalOverride nexus addresses
Sell On US Only⚠️ Optional (Plan only)Hide plan unless buyer is in US

Example: Plan with US-Only Restriction

{
  "planId": 456,
  "usVATConfig": {
    "active": true,
    "taxCode": "40030",
    "sellOnUSOnly": true
  }
}
This plan will only be visible to US customers.
⚠️ Important: Set active: true for the override to work. Without it, global settings will be used instead.

How US VAT Works in Practice

During Checkout

When US VAT is active and a customer selects the United States:
  1. Address Collection Required: Customer must provide complete US address
    • Street address
    • City
    • State (2-letter code)
    • ZIP code (5-digit or ZIP+4)
  2. Address Validation (if enabled):
    • Address is validated against USPS database
    • System may suggest corrected/normalized addresses
    • Customer can choose from validated options
  3. Tax Calculation:
    • Tax calculated based on exact address
    • Includes state, city, and county taxes
    • Tax amount shown before payment
  4. Tax Updates:
    • Tax recalculates automatically when address changes
    • Preview APIs reflect updated tax amounts

Automatic Transaction Upload

When enabled, UniBee automatically:
  • ✅ Uploads paid invoices to TaxJar
  • ✅ Creates refund records for refunds
  • ✅ Maintains transaction history for tax filing
This ensures your TaxJar account stays synchronized for tax reporting.

US-Only Plans

Plans with sellOnUSOnly: true:
  • Only visible to US customers
  • Hidden from international customers
  • Useful for location-restricted services

Getting Tax Codes

Use the TaxJar category list API to:
  • View all available product tax codes
  • Find the right tax code for your products
  • Update tax codes when gateway changes
API: GET /api/merchant/vat/us_vat_category_list

Best Practices

Setup Recommendations

  1. Start with Sandbox: Test with TaxJar Sandbox API key before going live
  2. Enable Address Validation: Ensures accurate tax calculation
  3. Upload Transactions: Enable automatic upload for tax filing compliance
  4. Configure Nexus Properly: Only add states where you have business presence

Address Management

  1. Collect Complete Addresses: Always require full US address for accurate taxes
  2. Validate Addresses: Use address validation to catch errors early
  3. Handle Address Changes: Recalculate tax when customers update addresses
  4. Display Normalized Addresses: Show TaxJar’s normalized addresses for confirmation

Tax Code Selection

  1. Choose Correct Code: Select tax code matching your product type
  2. Review Tax Codes: Check TaxJar documentation for appropriate codes
  3. Update When Needed: Tax codes can change - review periodically

Compliance

  1. Monitor Transactions: Check transaction upload status regularly
  2. Keep Records: All tax calculations are logged for audit
  3. Review Tax Amounts: Verify calculated taxes match expectations
  4. Handle Refunds: Refunds automatically use original tax rates

Common Use Cases

Case 1: SaaS Product for US Market

Setup:
  • Tax Code: 40030 (Software as a Service)
  • From Address: Your business location
  • Nexus: States where you have employees/office
  • Upload: Enabled for tax filing
Result: Automatic sales tax calculation based on customer location

Case 2: US-Only Plan

Setup:
  • Plan-level override: sellOnUSOnly: true
  • Global US VAT: Active
Result: Plan only visible to US customers, taxes calculated automatically

Case 3: Multiple Product Types

Setup:
  • Global Tax Code: Default code (e.g., 00000)
  • Product A: Override with 31000 (Clothing)
  • Product B: Override with 20010 (Digital Goods)
Result: Each product uses appropriate tax code

Troubleshooting

Issue: Tax Not Calculating

Possible Causes:
  • US VAT not enabled globally
  • Customer address incomplete or invalid
  • No nexus configured for customer’s state
Solution:
  • Check global configuration is active
  • Verify customer provided complete US address
  • Ensure nexus addresses include customer’s state

Issue: Address Validation Failing

Possible Causes:
  • Invalid ZIP code format
  • Incomplete address
  • Address doesn’t exist in USPS database
Solution:
  • Verify ZIP code (5-digit or ZIP+4)
  • Ensure all required fields provided
  • Try alternative address formats

Issue: Wrong Tax Amount

Possible Causes:
  • Wrong tax code selected
  • Outdated nexus configuration
  • Address not validated
Solution:
  • Review tax code matches product type
  • Update nexus addresses if business expanded
  • Enable address validation for accuracy


By following this guide, you can successfully set up US sales tax collection with TaxJar, ensure checkout compliance, and maintain accurate tax records for filing.