How far in the process are you currently?
Have you registered your Organisation on the Twitch Dev Console https://dev.twitch.tv/docs/companies?
Have you claimed ownership of the game on Twitch that your organisation developed/publishes https://dev.twitch.tv/docs/companies#game-management?
If you have done those steps, what part of the Drops guide are you getting stuck on? https://dev.twitch.tv/docs/drops explains it step by step, what the prerequisites are, how to create Drop Rewards, how to create a Drops Campaign, How to test the Drops, how viewers can link their account. It’s all there, so what specifically are you having trouble with?