The Corporate Transparency Act (CTA) mandates all legal entities, primarily corporations and LLCs, to disclose their ownership to FinCEN, with specific exemptions for large operating companies. Its purpose is to enhance U.S. national security and financial transparency, with penalties for noncompliance including civil fines and criminal charges. The CTA takes effect for new reporting companies in 2024, requiring initial filings within 90 days of creation, and all companies must update ownership information with FinCEN within 30 days of any changes.