Usage:
Taxes can be added if Apply all Applicable Taxes from Customer to this Product is checked.
Navigation: Administrator > Settings or on Home Page then Global > Products & Tasks Lists > Products
Products form - Product Taxes tab
Taxes can be added if Apply all Applicable Taxes from Customer to this Product is checked. If this option is checked, then the taxes added in Customer settings > Taxes will be applied automatically to the product (only for taxable products) upon case entry.
See also:
Products for more options