Thanks for reaching out to the Community, @Tiffanylashco.
You could have the wrong mobile app that is why you've got that error message.
To download the QuickBooks Self-Employed (QBSE) app, check below links:
Once you've downloaded the app, make sure to use the same login credentials upon signing up.
To learn more about how QBSE works, check these helpful articles:
If there's anything else I can do for you, get back to me by commenting below. You can count on me. Wishing you continued success.