There are a few things you can do to update your Instagram bio with a new line. First, make sure that your account is up-to-date with the latest software. If you don’t have an account, sign up for one now. Next, make sure that your bio is accurate and up-to-date. Check to see if there are any changes to your name or profile picture. If there are, update them as soon as possible. Finally, make sure that your content is interesting and engaging. Try to include new and interesting photos, videos, and stories.