Robocall Trace Back Enhancement Act This bill provides liability protection for specified information-sharing activities undertaken to trace the origins of unlawful robocalls. Specifically, the bill protects a designated consortium that conducts private-led efforts to trace unlawful robocalls from liability for receiving, sharing, or publishing information about illegal calls, including their origin or source. The bill also applies liability protection to a voice service provider (i.e., a provider of any service that enables real-time, two-way voice communications) or other entity or person that shares information with the consortium.