Initiating a deposit into Tornado Cash requires connecting a secure Web3 wallet like MetaMask. You must then select from the available asset pools and specify your deposit amount. After approving the transaction and paying the network gas fee, your funds are locked in the smart contract. The most critical step follows: securely saving the generated secret note. This note is your only key to accessing these funds later. The Tornado Cash site provides detailed, visual step-by-step instructions to ensure a safe and successful deposit every time.