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API Reference
Retrieving Access Tokens
Getting Started
Product Overview
Features
Vertex for e-Commerce
Vertex VAT Compliance Service
Taxamo Assure
Vertex Invoice IQ
Vertex Validator
Supported Countries and Regions
Getting Started
Introductory Concepts
Integration Options
Single Sign On (SSO) with Okta
Test and Live Modes
Release Notes
Tax Rate Changes
Release Notes for 2025
Release Notes for 2024
Release Notes for 2023
Release Notes for 2022
Appendix
Glossary
Name Changes
Versions
Copyright Notice
Direct API Integrations
Getting Started with the API
Retrieving Access Tokens
Example Direct API Integration
Transaction Modeling
Mandatory and Required Fields
Transactions
Transaction Keys
Physical Goods
Tax Inclusive and Exclusive Pricing
Currencies
Location Evidence
Subscriptions
Mapping Company IDs to Customer Codes
Invoice IQ Integration
B2B Transaction Processing
Refunds
Important Fields
Dictionaries
Error Message Guide
Custom Fields
Indonesia
US Sales Overview
Tax Calculation
Address Validation
Tax Categories
Exemption Certification
Product Tax Codes
Non-API Integrations
Checkout Form Overview
Configuring Stripe as a Payment Provider
Configuring PayPal as a Payment Provider
Integrating the Checkout form with your Webstore
One-time Sales
Subscriptions
Customization
JavaScript API
Subscriptions for Stripe
Webhooks Overview
Vertex Webhooks
Vertex Webhooks Example
Stripe Webhooks
Connectors
Zuora
Drop-In UI Overview
Components
Data Attributes
JavaScript API
Events
Vertex Invoice IQ
Vertex Invoice IQ
Integrated Vertex Invoice IQ
Standalone Vertex Invoice IQ
Informative Invoices
Invoices without Tax ID Validation
Invoice Support per Country
Invoice Settings
Email Settings
Invoice Templates
Invoice Security
Invoices for Subscriptions
eGUI Configuration for Taiwan
Vertex Validator
Vertex Validator
External Validation Service Downtimes
Integrated Vertex Validator
Validating Multiple Tax IDs for Canada
VAT Status Cache
Standalone Vertex Validator
Validation Type per Country
Custom Tax ID Type
Egypt Configuration
Switzerland Configuration
CAPTCHA Validation
Redacted Responses
Bulk Tax ID Validations
Bulk Validation Request
Poll Results
Vertex VAT Compliance Service
Vertex VAT Compliance Service: Overview
Getting Started with Vertex VAT Compliance Service
Vertex VAT Compliance Service UIs
Filing a Tax Declaration
Creating a Tax Payment
Dashboard
Dashboard Overview
International VAT/GST UI
Transaction UIs
List UI
Manual Transactions
Bulk Transaction Uploads
Settings
Account Settings UI
User Roles
Enabling Multi-Factor Authentication
Country Settings
Invoice Settings
Threshold Monitoring
Tax Settings
Physical Goods Settings UI
Reports
Settlement Report
Detailed Settlement Report
B2B Reports
Logs
Troubleshooting Guide
Cannot Find Invoices
eGUI Number Pool for Taiwan is too small
VAT Number is Invalid
Cannot find Taiwan eGUI Documents
Troubleshooting SSO
Permission Denied Errors for SSO
Cannot Log in to Okta
Cannot View SSO SAML Section
API Reference Guide
Reference Guide Overview
Requests
Calculate tax
Validate VAT number
Confirm transaction
Un-confirm transaction
Retrieve full transaction
Store transaction
Browse transactions
Retrieve transaction
Cancel transaction
Cancel refund by subnumber
Create a Refund
Bulk Refunds
Get transaction refunds
Cancel refund
Get refund details
Get event data
Schedule Detailed Settlement Reports
List Scheduled Detailed Settlement Reports
List Detailed Settlement Reports (Legacy)
Download Detailed Settlement Reports (Legacy)
Fields
Transaction Schema
Vertex Validator Schema
Address Schema
Countries Schema (For Location Evidence)
Location Evidence Schema
Additional Interactions Schema
Additional Currency Schema
Refunds Schema
US Tax ID Schema
Tax Components Schema
Dictionaries
Product Types
Countries
Currencies
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