Currently, I have to manually create identities with all the fields being the same (except for the email address) just to have two different form-fill identities with the same postal address, etc.

I can't even duplicate an existing one.

I literally had to manually copy and paste all the address, SSN, and other information to create identities entirely by hand, just to have identities for three emails.

Perhaps an identity alias is too complicated.
But then I would at least like to be able to clone an identity and then just adapt the email address on the clone – not having to fill in all the other fields manually again.

Thank you in Advance.