To convert USDT from ERC20 (Ethereum network) to TRC20 (TRON network), you need to use a trusted cryptocurrency exchange or bridge that supports both networks. Start by transferring your ERC20 USDT to an exchange like Binance, KuCoin, or OKX. Once the USDT is deposited, initiate a withdrawal and select TRC20 as the network for the USDT transfer.