The Clover ID is a 13-Alphanumeric code. There are two ways to get the correct Clover ID.
Log in to your Clover account, scroll down and find More and access the AppMarket.
Now, check the URL of that page, it should look something like this https://www.clover.com/appmarket/m/H5FZQKK5W2DW1On your Clover POS, look for the app called Diagnostics (you'd need to install this if it is not yet in your Clover dashboard). Scroll down to the very bottom and hit on Additional Details.
You should see your Clover ID here.