How to change email address

I have actually been here for years but returned to ask information on my computer.  I noticed that I had gotten replies to past questions that I never received an email about.   I noticed that when signing up, I missed a letter in my name/email.

I have SEARCHED for a place to change my email so I can get notifications but can not locate anywhere.  I have gone to profile and set up.  I find my name, I find email settings (but it only allows for selecting what type of email notifications to receive but NO place can I find to actually change my email address).

I did read a couple of people ask about this and they were told to do what I have already done with going to account settings and profile. I simply can not find this email address change location.

Thanks for any help you can give.