We live in a world where MFA (multi-factor-authentication) becomes important. Currently there is no way to store that information within a password in LastPass. It would be nice to have either a dedicated field for it or (much better) make it possible to add tags to Password entries.
With that I can simply search for this additional field or tag and for example let me show all Passwords, where I use my mobile number as MFA.
Currently it is impossible and the only way is to add a note in the description field and then search manually all Password entries.