Can I save my username so it comes up automatically when I open QBO?

Yes, you can save your username so that it automatically appears when you open your QuickBooks Online account, @esb205-gmail-com.

You just have to put a checkmark next to the Remember my user ID box on the Sign in page. This way, the system will keep the username you register when logging in to your account. 

You can utilize the visual reference below as your guide: 

Additionally, I'll be sharing these relevant articles you can use for future tasks in managing your account in QuickBooks Online:

• Reset or change your login information for QuickBooks Online, QuickBooks Online Accountant, and QuickBooks Self-Employed
• Get started and adjust settings after you sign up for QuickBooks Online

I'm just one click away if you need anything else in managing your login credentials in QuickBooks. I'll be here to ensure your success. Have a great day ahead.