1. Be anonymous as much as possible because such money in your custody could attract issues.
2. search google and watch YouTube videos on the exchanges in USA, then you will have an idea of what to do.
3. Also trying to watch videos and some crypto materials relating to crypto tax in the US.
I hope this help in a little way.
Thanks this is very helpful. I've already done some trading in US exchange so aware of the operations. But I'm not sure the impact of doing this in larger amount (like 10 btc over one year period, actually each transaction amount is not that big) in exchange like Coinbase.