If you don't have a mobile phone, here's an easy way to add Paypal to Cash app as a banking app. Go to the PayPal website. Log in to your PayPal account. First, click the wheel icon on the right side of the Preferences window or in the menu bar. Then click Money, Bank, Card on the left side of the screen. In the "Bank Accounts" section, click "Connect New Bank Account." Click on "Bank link". Account details. However, for more information about PayPal, you need to visit the website.