Hi - I answer from the OpenSmartRoute documentation: routing, the API, plans and quotas, self-hosting. Ask away, or open a support ticket if you need a person.
Grounded in the docs - follow a source before acting on it.
Avalara E-Invoicing & Live Reporting - Tool - OpenSmartRoute
Toolv1.0.0
Avalara E-Invoicing & Live Reporting
Provides access to Avalara E-Invoicing and Live Reporting APIs for document statuses and compliance