To register for 2FA, all you have to do is to complete these steps:
i) Log in to your SingPass account
Click "Set Up 2-Step Verification (2FA)" under the Quick Links section.
ii) Register for SMS or OneKey token
You can choose to receive One-Time Passwords (OTPs) via SMS, or generate through a OneKey token. Upon successful registration, a PIN mailer and token (if you select token) will be sent to your registered address within seven working days for activation.
iii) Activate 2FA
Follow the instructions in the PIN mailer to activate your 2FA. Watch this video guide for more info: https://youtu.be/pHmFK78IlVI
Alternatively, if you have verified your Singapore-registered mobile number with SingPass, you can SMS "Register" to 78008 (if you are in Singapore) or +65 82411666 (if you are overseas).This is so that you can receive OTPs via SMS when performing sensitive government e-transactions.