Are you on a computer or mobile device?
If using a computer click on your callsign in the top right, click "your account" (should already be selected), a box will drop down, "Account Details" is on the left a few lines down. The next screen that appears, scroll down about half way and you should see Ham callsign.
Thanks, I'll try that. I've been using the android app. Will fire up the computer.
View attachment 209397