Taxing physical products but not taxing courses

Site URL: https://moonmalasbymegan.com/

Hello there! My client (moonsmalasbymegan.com) sells both tangible products and courses on her website. Per her accountant, her tangible products need to be taxed, but her courses don't.

I've set up/connected TaxJar to her site for collecting taxes. However, taxes are being withheld for both tangible products and her courses. I've reached out to both TaxJar and Squarespace about this. Per Squarespace, there isn't currently a way within Squarespace to delineate between the physical products and courses that would keep TaxJar from collecting tax on courses. I've asked the same of TaxJar with no solution.

I'm hoping someone has had experience with this and can speak to what creative work-around they've managed to use to keep courses within Squarespace from being taxed, while still allowing tangible products to be taxed.

Many thanks in advance for your help!

Elizabeth