Welcome to the Community, Anne0508.
 

When your QuickBoosk Desktop Login window displays, you'll see fields for User Name and Password. There should also be an I forgot my password option and a few selectable buttons (OK, Cancel, and Help).
 

I've included an image showing what the sign in screen looks like:

Since you're not seeing any way to log in, I'd recommend closing QuickBooks and reopening it to see if the same problem occurs.. In the event it continues, please take a screenshot and post it in a reply so I can see what you're seeing. This will help me to better analyze the situation and see what troubleshooting options there are.
 

I've included a detailed resource about working with Intuit accounts which may come in handy moving forward: Change, manage or update your account with CAMPs
 

I'll be looking forward to hearing back from you. Have a great day!