To improve your chances of Toll-Free Verification (TFV) approval, ensure that your business information is accurate and verifiable, validate your company's online presence, clearly define your use case, and provide opt-in consent with clear documentation. Common errors leading to rejections include incomplete or incorrect business details, unverifiable website URLs, vague or incomplete use cases, and insufficient opt-in methods. By following best practices and meeting the required standards, you can increase your chances of successful TFV approval and start sending messages from your Toll-Free Phone Number (TFN).