Inventory item NOT marked 'taxable' but still contributes to taxable subtotal on invoice

Inventory item NOT marked 'taxable' but still contributes to taxable subtotal on invoice

Hi - I've unchecked the 'taxable' box for an inventory shipping item which is not taxable, however, it is always added to the taxable amount. This did not used to occur, only when recent inventory changes were made to Zoho.

Any way to fix this?

Thanks!

Neal