Allow me to chime in, @ntuitiveitisnot.

The Invoice tracker is a new feature that's included in the QuickBooks Desktop update. At this time, the only steps to remove it are mentioned by @Rejeil_O in the previous thread. Since the feature is new, the option to remove it is unlikely for now. However, I'll submit Feedback to our Development Team personally, so they can consider a way to remove it in future updates. In the meantime, you can provide Feedback in your QuickBooks Online account by going to the Gear icon and choosing Feedback.

Feel free to post below if you have any other questions or concerns. I'm always here to help.