Let's perform some troubleshooting steps to log in to your QuickBooks Desktop (QBDT) file, Derek.

If you can't log in due to a username or password issue, you can reset it immediately by selecting the I forgot my password link. I'm also adding this article for the step-by-step instructions: Reset your password for QuickBooks Desktop (US article, but the same resources work for QBDT South Africa).

In case the password doesn't work, review your information carefully. Check for any typos and ensure that the info matches what's in CAMPS.

However, if the error has no connection with your login credentials (username or password), may I know if you're getting an error message? It'll help me thoroughly investigate the issue and gather the necessary resources to address it effectively. A screenshot would also be very helpful.

Once you can open QuickBooks successfully, continue with your business tasks.

I suggest getting back to this thread if you need more help accessing your QBDT account. I'll be right here to help.