Let's perform a few troubleshooting steps so you can log in to your QBSE account, dabeasman.
First, let's ensure that you downloaded the QuickBooks Self-Employed app based on the device you're using. You can uninstall and download the app from here.
Then, log in to app and use the same credentials when accessing your QBSE account in the regular browser.
Here are some articles that you can check on what you can do within the QBSE app:
Let me know how this works. I'll be here to help!