Zamp for Shopware: Order Processing

Order Processing

How Tax Calculation Works

The Zamp Tax plugin processes orders through the following steps:

1. When an order is initiated, the plugin checks if tax calculations are enabled
2. The plugin validates the shipping address is in a configured taxable state
3. Customer group tax exemption status is evaluated
4. Product tax codes are collected for each line item

Real-time Tax Computation

Tax rates are calculated in real-time during checkout:

1. Cart contents are sent to Zamp API including:
   • Line items with quantities and amounts
   • Product tax codes
   • Shipping address
   • Customer exemption status
2. Zamp API returns:
   • Itemized tax calculations
   • Applied tax rates
   • Total tax amount

Order Transaction Flow

The transaction process follows this sequence:

1. Pre-transaction validation:
   • Verify API connectivity
   • Check address is in taxable state
   • Validate product tax codes
2. Transaction processing:
   • Calculate tax rates
   • Apply tax to line items
   • Generate tax breakdown
3. Post-transaction actions:
   • Log transaction details
   • Store tax calculations
   • Queue for reporting

Tax Rate Application

Tax rates are applied according to these rules:

• Line item tax calculation:
  • Individual tax rates per product
  • Based on product tax code
  • Considers shipping location
• Shipping tax calculation:
  • Separate shipping tax rates
  • Based on delivery address
  • Follows state regulations
• Exemption handling:
  • Zero rate for exempt customers
  • Partial exemptions where applicable
  • Documentation requirements