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
Getting Started with TaxJar
Prerequisites
Before setting up TaxJar integration, you’ll need:- TaxJar Account: Sign up at taxjar.com
- 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
- Go to Settings page in UniBee Admin Portal
- Navigate to VAT & Tax → US VAT Gateways
- Click Add Gateway
- Select TaxJar
- Paste your TaxJar API key
- Check Set as default if this is your primary gateway
- Click Save
Option B: API Setup
You can also set up TaxJar via API: Endpoint:POST /api/merchant/vat/setup_us_vat_gateway
Request:
✅ 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
| Field | Required | What It Does |
|---|---|---|
| Active | ✅ Yes | Master switch to enable/disable US VAT globally |
| Default Gateway | ✅ Yes | Select TaxJar (or other enabled gateway) |
| Tax Code | ✅ Yes | Product tax code (e.g., “40030” for SaaS, “31000” for Clothing) |
| From Address | ✅ Yes | Your business origin address (where goods/services ship from) |
| To Address | ⚠️ Optional | Default destination (usually left empty to use customer address) |
| Nexus Addresses | ⚠️ Optional | States/cities where you have business presence (required for tax collection) |
| Check Address Via Gateway | ⚠️ Optional | Validate all US addresses through TaxJar (recommended for accuracy) |
| Upload Invoice To Gateway | ⚠️ Optional | Automatically 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
- Go to Settings → VAT & Tax → US VAT Configuration
- Enable Active toggle
- 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
- Enable Check Address Via Gateway (recommended)
- Enable Upload Invoice To Gateway (for tax filing)
- Save configuration
API Configuration
Endpoint:POST /api/merchant/vat/setup_global_us_vat_config
Example Request:
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):- Plan-level configuration
- Product-level configuration
- 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
| Field | Required | Description |
|---|---|---|
| Active | ✅ Yes | Enable this override (must be true to take effect) |
| Tax Code | ⚠️ Optional | Override tax code for this product/plan |
| From Address | ⚠️ Optional | Override shipping origin address |
| To Address | ⚠️ Optional | Override destination address |
| Nexus Addresses | ⚠️ Optional | Override nexus addresses |
| Sell On US Only | ⚠️ Optional (Plan only) | Hide plan unless buyer is in US |
Example: Plan with US-Only Restriction
⚠️ 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:-
Address Collection Required: Customer must provide complete US address
- Street address
- City
- State (2-letter code)
- ZIP code (5-digit or ZIP+4)
-
Address Validation (if enabled):
- Address is validated against USPS database
- System may suggest corrected/normalized addresses
- Customer can choose from validated options
-
Tax Calculation:
- Tax calculated based on exact address
- Includes state, city, and county taxes
- Tax amount shown before payment
-
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
US-Only Plans
Plans withsellOnUSOnly: 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
GET /api/merchant/vat/us_vat_category_list
Best Practices
Setup Recommendations
- Start with Sandbox: Test with TaxJar Sandbox API key before going live
- Enable Address Validation: Ensures accurate tax calculation
- Upload Transactions: Enable automatic upload for tax filing compliance
- Configure Nexus Properly: Only add states where you have business presence
Address Management
- Collect Complete Addresses: Always require full US address for accurate taxes
- Validate Addresses: Use address validation to catch errors early
- Handle Address Changes: Recalculate tax when customers update addresses
- Display Normalized Addresses: Show TaxJar’s normalized addresses for confirmation
Tax Code Selection
- Choose Correct Code: Select tax code matching your product type
- Review Tax Codes: Check TaxJar documentation for appropriate codes
- Update When Needed: Tax codes can change - review periodically
Compliance
- Monitor Transactions: Check transaction upload status regularly
- Keep Records: All tax calculations are logged for audit
- Review Tax Amounts: Verify calculated taxes match expectations
- 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
Case 2: US-Only Plan
Setup:- Plan-level override:
sellOnUSOnly: true - Global US VAT: Active
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)
Troubleshooting
Issue: Tax Not Calculating
Possible Causes:- US VAT not enabled globally
- Customer address incomplete or invalid
- No nexus configured for customer’s state
- 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
- 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
- Review tax code matches product type
- Update nexus addresses if business expanded
- Enable address validation for accuracy
Related Topics
- Collect Taxes - International VAT setup
- Invoice Computation - Understanding tax in invoices
- TaxJar Documentation - TaxJar API reference
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.

