I have a new Galaxy S8. I set up gmail for my gmail account, then added an IMAP account. Now I want to remove the IMAP account from Gmail but I can't find where to do that.
Welcome to Android Central! Open the Gmail app, tap Menu>Settings, select the IMAP account, and see if there is a Remove Account option there. You might have to tap the Menu button again on that screen.
Otherwise, go to the main system settings screen, then Accounts, then look for that account. If it's there, tap it, then tap Menu>Remove Account.