We appreciate you letting us know about the problem you're experiencing with taxable amounts in your reports, ACromphout.
 
We can see how time consuming it is to handle any incorrect sales tax categorizations, especially when it involves manual corrections. Allow me to share a resource to help you get going.
 

In this case, I recommend reviewing this article: Learn how QuickBooks Online calculates sales tax. It provides insights into how QuickBooks determines taxable and non-taxable amounts, which could supply clarifications regarding your situation.

However, if you continue to run into issues with sales tax not reflecting correctly, I suggest contacting our Customer Support Team again. They have the tools needed to look into your specific situation and assist you in resolving this matter.

You may also let QuickBooks automatically estimate your potential sales taxes. Doing so can help you review and prepare for your upcoming sales tax totals.

Please know that you can always drop by again to this thread if you have more questions about managing your sales taxes in the platform. Our doors are always open to help you accordingly.