To log in to your Square account, navigate to squareup.com and click on "Sign In" at the top right corner of the homepage. Enter your registered email address and password, then click the "Sign In" button to access your dashboard. If you have enabled two-factor authentication (2FA), you'll be prompted to enter a verification code sent to your mobile device. This additional security step helps protect your account from unauthorized access. If you've forgotten your password, click on "Forgot Password" to reset it. Always ensure you're logging in from a secure and trusted device.