Go into your phone's settings.
Choose "Phone Settings" or "My Settings"
Choose "Email Settings" if that setting exists. If you don't see it, your particular type of Tracfone doesn't have email capabilities and you'll need to upgrade to use the email.
Click "My Email Settings"
Click "Email Address"
Input the address you would like, if there isn't one there. If there is an email address there, you must use it. Some Tracfones will have an address you must use, and some will only have a partial address, like @tracfone.com.
Click "Set" to set your email address.
Hope this helps!!