Can you tag someone in an Instagram Story using a private account?

No, you cannot tag someone in an Instagram Story using a private account. Instagram's tagging feature only allows users to tag accounts that are public or accounts that the user is following. If an account is private, it cannot be tagged in Stories by users who are not already following that account.

However, if you're tagged in someone else's Story and your account is private, you'll receive a notification and can choose whether to allow the tag to appear on your profile.

Keep in mind that Instagram's features and policies may change over time, so it's always a good idea to check for any updates or changes in the app's functionality.