How do I verify my KuCoin in the US?

Could you please provide a step-by-step guide on how I can verify my KuCoin account in the United States? I'm looking for specific details on the necessary documents, the verification process, and any potential challenges or restrictions I might encounter as a US-based user. Additionally, I'd appreciate any insights into the time frame for completing the verification process and any benefits that come with a verified account. Thank you for your assistance.