Have the Admin user (or anyone else, really) log in to the file and then tell you what it is from the user list.

forgot user name 

never had to enter it before I upgraded

I am the only user

Hi there, @Roxanne23.

The default user when a new QuickBooks Desktop file is created is the Admin. Try typing "Admin" in the username field. If you haven't entered password previously, leave it blank.

If this doesn't work, I recommend reaching out to our Customer Care Support team for further assistance in recovering your username.

Here's how:

1. Select QuickBooks Desktop Help from the Help menu.
2. Click Contact Us.
   
3. Type in a short description of your concern, then Continue.
4. Choose a way to connect with support.

For more details about our support availability, refer to this article: Contact Support. 

Additionally, this article instructs you on how to add, modify, and resolve user login and restriction issues: QuickBooks Desktop Users and Restrictions.

Get back to this thread if you have other concerns with accessing your company file. We'd be happy to help you some more.

I need help with my username

I need QB to give me my username

@what7 

QB Desktop or QB Online?

I understand that you're looking for assistance with retrieving your username, what7.

QuickBooks takes security seriously and require you to go through a verification process before disclosing sensitive account information like your username. This could involve confirming your identity through various means such as providing personal details or answering security questions.

To undergo this process, I recommend contacting our Support Team to get your username. Go to the Help menu and select QuickBooks Desktop Help F1. 

Alternatively, we can use the link below.

1. Go to this link: Contact Support Team.
2. Then, follow the on-screen instruction to complete the process.

Another option is by logging in to your CAMPs. CAMPs allow you to efficiently handle of accounts, products, contacts, billing, and user ID access. Please note that CAMPs uses the email address associated with your registered product, which may differ from the one used to sign in to your company file. 
 

Here's an article for more details: Change, manage or update your Intuit account with CAMPs.

You're always welcome to post your concerns here. Just go back to this thread anytime. I'll be around to help you. Take care and stay safe.