If you have already done this since June 2020, there’s no need to do so again.
1. Make sure you have completed all the fields
2. After signing, make sure you click “Finish”, then “Tap to sign” on a phone/tablet, or “Click to sign” on a computer
3. Make sure your DoB is shown in the format DD/MM/YYYY
4. Still having trouble, watch our how-to video here.