Welcome to the thread, @Rex00. 

Thanks for providing detailed information about your concern.

Since you're still prompt to enter a code after turning off the two-factor authentication feature, this time, let's try opening your account in a private (incognito) window. Using a safe browser and accessing the program from there can usually fix the issue.

Check out these keyboard shortcuts:

• Command + Shift + N (Safari)
• Ctrl+ Shift + N (Google Chrome)
• Ctrl + Shift + P (Mozilla Firefox) 

From there, try to turn off the two-factor authentication again. For more information about the process, see this article: Turn on or turn off two-step verification.

However, if the issue persists, I recommend contacting our Customer Care Team. They have the tools to check your account and verify the root cause of the problem. To reach them, click the ? Help button at the top-right corner and select Contact Us to talk with a live agent. Ensure to review their support hours to know when agents are available.

If you need additional assistance while managing your QuickBooks account, let me know. I'll be around to provide further assistance. Have a nice day.