Open the Google Account settings page: https://myaccount.google.com/
Sign in to the Google account you want to remove
Select Security
Under “Your connections,” select Manage all
Find the connection type you want to remove and select it
Follow the prompts to disconnect or remove the connection
If you want to remove the Gmail account from a device, open your device’s Settings
Go to Accounts (or Users & accounts)
Select Google
Choose the account to remove
Select Remove account
If you want to delete the Gmail address, go to https://myaccount.google.com/deleteservices
Sign in if prompted
Under “Delete a Google service,” select Delete next to Gmail
Follow the prompts to confirm deletion
Review what happens to your data and subscriptions
Confirm deletion