How do I get taxed on BTC gains from foreign exchanges with no KYC?

I'm from the US, and I can use a VPN to login to a foreign exchange that has no KYC to buy/trade BTC. If I were to send BTC from my hard wallet to that foreign exchange, and let's say I played the leverage game (I know, we hate it), and significantly increased my stack, how would I pay taxes on that gain?Is it only if I send back to an exchange with KYC that reports to the IRS? Can I send back to my hardware wallet? via /r/Bitcoin https://bit.ly/3J0LNgV