Hi there, mike_van_de_wate.
Unlike QuickBooks Desktop, this option isn't offered in QuickBooks Online (QBO).
I can see how beneficial this feature to you and other users of QBO. I'll definitely forward this to our developers so they can consider this and be part of the next update.
You may find this article helpful: How to use reports to troubleshoot problems with sales tax amounts.
You can always drop by in the Community if you have other concerns.
