Please visit https://usdx.cash/airdrop to see detailed instructions. We also have video tutorials on how to complete each task: https://www.youtube.com/playlist?list=PLiyt3_RSiV68L5eZ3IXwg_gMOn9eVdXjU. And finally you can ask Airdrop related questions in our official Telegram channel: https://t.me/USDX_Airdrop_Bounty_support.