It's good to see you here in the Community, @gjwilt.

I'd love to help you with your concern about logging in using Symatics, but can you please provide further information about it? Is this a third-party app? Any additional details would help us provide the best resolution on this matter.

Please know you can continue to reach me here with your additional questions. I'll be standing by for your response.

It is Symantec VIP, a standard code generator security app.  I authenticated it, and everything said it was ready, but every time I try to log in using the code generated by the app, I can't log in.

Thank you for getting back and providing us with more details about the third-party app that you're using upon logging in to your QuickBooks Self-Employed (QBSE) account, @gjwilt.

To check what's causing the error you're having when trying to log in using the code generated by the app, I suggest reaching out to Symantec VIP customer support. They can isolate the error you're having in a secure environment and resolve it.

In the meantime, you can log in to your QBSE account using this link: QuickBooks Self-Employed. Then, get the 6-digit code for the verification we sent to your email address. 

In case you forgot your QBSE account credentials, refer to the following article on how to recover your account: Reset your password or recover your user ID for QuickBooks Self-Employed.

Let me know in the Reply section below if you need more help logging in to your account. Keep safe and have a wonderful day!