Appointments show as 'TAXABLE Y' when on receipt from merchant

On the receipts from the merchant it shows 'Taxable Y' for appointment services and since these are for appointments they are tax exempt. Where do I tell Appointments+ or MP to pull NO TAX for the Appointments Product.

I currently have the tax rate at 0 to keep it from adding the tax on. but as soon as we start selling products other than the appointments I wont be able to do that.

Many thanks in advance as always.