The Instagram handle you want is on your own old account

First, get back in

1. On the login screen, use Forgot password with the old email, phone number or username.
2. Check old inboxes for Instagram emails, which show the address the account used.
3. If the email or phone is gone, follow the steps Instagram offers for confirming your identity.
4. Turn on two-factor authentication once you are in.

Then move the handle

1. On the old account, change the username to something else and save.
2. Straight away, set the handle on the account you want it on.
3. Do both steps close together, because a released name can be taken by anyone.

If you cannot get back in

Without access, Instagram treats the old account like any other holder. A report route only fits if its facts apply, such as an account posing as you. Read the routes comparison before you choose one.