What is the critical number that must be confirmed to turn on Service Cloud Voice in the US?

To activate Service Cloud Voice in the US, it is essential to confirm the Tax Registration Number. This number is crucial as it serves as a unique identifier for businesses, allowing the system to validate the company's tax status and ensure compliance with various regulations. Proper verification of the Tax Registration Number ensures that the business is recognized and authorized to operate within the regulatory framework of the IRS and state taxation bodies.

While other identifiers like the Social Security Number, Business License Number, and Company Registration Number can serve different purposes, they do not specifically address the taxation compliance needed for Service Cloud Voice activation. The focus on taxation aligns with the requirements for financial and operational readiness, making the Tax Registration Number a critical component in this context.