Open Gmail on your phone or computer
Look at the top-right corner for your profile picture or initial
Click or tap your profile picture or initial
Check the email address shown under your name
Open the Gmail app and tap the profile icon to see your Gmail ID
Go to Google Account settings and find the email address listed there
Check the inbox or sent emails for the address in the From field
If you are signed in on a browser, look at the account name in Google services
Use the Gmail sign-in page and see the email address already saved in the browser
Ask someone who has received an email from you to check your address in the message details