If you want to add Binance Smart chain to metamask account, then you are at the right place. You'll want to start by going to the MetaMask Download page. Then, depending on whatever platform you're using, follow the steps to install it. The first step is to create a MetaMask account. then comes the following step: The next step is to send from the Binance extension wallet. By hitting send, you can confirm the transaction. MetaMask will show the transaction.