add SMS to an established account

[Wakazashi]

Hi there, just curious where i can add my SMS Text messages for password reset for my forum accounts.

I know it gave me the option before when i initially created my account to add my phone number but at that time i wasn't really interested in doing so, but now i want to add my phone# since im more invested in protecting my accounts and my memory is getting worse these days, worried i'll forget my account pw.