I filed my I-485 and received a notice in the mail with instructions to create a USCIS account using an online access code to check the status of my application.
But, I already had a USCIS account before this green card application, and I used that account number on the forms for my green card application. I expected to check the status using my existing account, but it seems like I need to create a separate account for this.
When I tried to add the case by receipt number on the USCIS website, it said the case is linked to another account. Is it normal to need a new account for this? If so, which account should I use if I file a non-green card application in the future?