Open Instagram and go to the login screen
Tap the account you want to remove from the remembered list
Tap Remove or Remove account
Confirm the removal
If needed, log out of all accounts first
On the login screen, tap the three dots or gear icon if shown
Select Manage accounts or Remove saved login info
Turn off saved login info if available
Clear Instagram app cache on your device
On iPhone, delete and reinstall the app if the account still appears
On Android, clear app data if the account still appears
Make sure you are not saving login info when signing in again