You want to find information about SaaS Pro REST API requirements.
AvaTax for Communications
- Developer.avalara.com is the resource for building the Communications API, where you can access the following information:
- Swagger (api_key, client_id, profile_id)
- Sample Code
- Developer Forum
- Find sample JSON and XML here: ttps://github.com/Avalara/Communica...eloper-Content