Are you refering to registering to use these forums, or to a Creative Cloud account or what? It is not good practice to use your email address on the forums because it invites spam.
I am trying to register Adobe Photoshop
it does not seem to accept anything
Use your email address for that. I can't remember exactly what the form looks like, but I suspect it will have fields for your real name (not a forum type alias) and your email address. Is the first time you have registered an Adobe product? If not, then you must use the same information as on previous occassions.
i tried that Trevor
let me try something .... i think it is a bug
so let me start from scratch
will let you know how i make out
it seems that if you make a mistake the first time around .. it goes into
some strange buggy loop
doing it from scratch worked