To link your Instagram account to a Facebook Page:
1. Go to your Instagram profile and tap menu.
2. Tap Settings.
3. Tap Account > Linked Accounts, then select Facebook. If you haven’t already, enter your Facebook login information.
4. By default, your Instagram account will link to your personal Facebook profile. To link to a Page instead, tap Share to.
5. Choose a Page that you manage.
Learn more about what happens when you link your Instagram account to a Facebook Page that you manage.