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.
irs-taxpayer - Tool - OpenSmartRoute
Toolv1.0.1
irs-taxpayer
44 local US tax estimation and planning tools for supported TY2024 through TY2026 scenarios.