How to sell ust?

Hello there, I'm interested in knowing the process of selling UST. Could you please walk me through the steps I need to take to successfully sell my UST holdings? Are there any specific platforms or exchanges that you recommend for this purpose? Additionally, are there any fees or taxes associated with selling UST that I should be aware of? It would be great if you could provide some insights into the best practices and considerations for selling UST in the current market conditions. Thank you in advance for your help.