I have just registered for VAT and having trouble with the VAT settings.
I have enabled online filing and when i put in my username and password (HMRC login number & password) I save the details, when saved my username shows my email address . . .is this right?
It wouldn’t be an email address. I would suspect you have some form filling tool/extension running that’s just overwriting it every time with your email address.
What browser are you running? Do you have any form filling extensions running like LastPass?