Is it possible to use Tax Classification code to override global location-driven tax configs?

Summary:

Enabled Tax classification codes on Expense reports, however no matter the code selected on expense report, the same standard rates are calculated on the invoice based on location.

Content (required):

Right now all taxes are configured based on location - this causes issue for certain expense types that shouldn't be taxable (ex: tips), but taxes are being calculated on anything, and overriding with tax exempt classification doesn't help. Is there anything I am missing?

P.S  Allow override of calculated tax lines is enabled

Version (include the version you are using, if applicable):

23C

Code Snippet (add any code snippets that support your topic, if applicable):