To deactivate your Instagram account temporarily, go to Instagram.com on a web browser, log in, and navigate to your profile by clicking your picture in the top right corner. Select "Edit Profile," scroll down, and click "Temporarily disable my account." Choose a reason, re-enter your password, and confirm. Your profile, photos, and activity will be hidden until you log in again. If you want to permanently delete your account, visit the Instagram Delete Account page, log in, select a reason, re-enter your password, and confirm the deletion. This action is irreversible, and all your data will be lost permanently.