Let me provide some information about the notification to rebuild your data, @Howdy74.
When the warning message happens when you log in to your QuickBooks file, then this isn't a scam. Unless, there is someone who call you or email you about this.
The warning is a reminder for you to rebuild your company file to fix some possible data issues. For more information, you may check out this article: Verify and Rebuild Data in QuickBooks Desktop.
Additionally, I've attached an article you can utilize to learn how to get different QuickBooks Desktop tools to help fix problems and errors: Fix common problems and errors with the QuickBooks Desktop Tool Hub.
Let us know if there's anything that I can help with rebuilding your data in QuickBooks. The Community is always here to assist. Stay safe!
