To add a bank account to Cash App, users should first open the application on their device and sign in to their account. Once logged in, they can navigate to the "Banking" tab, which is typically represented by a bank icon at the bottom of the screen. In the Banking section, there will be an option to "Link Bank Account" or "Add a Bank Account." Users will be prompted to enter their bank account details, including the routing number and account number. After entering this information, it is important to follow any additional prompts to verify the account. Once completed, the bank account will be successfully linked to Cash App, allowing for seamless transfers and deposits. For the most accurate and up-to-date information, it is advisable to refer to the Cash App support page.