How can i see the "Tax Included" field in AR - Customer - Invoicing tab in tax group section ?

How can i see the "Tax Included"  field in AR - Customer - Invoicing tab in tax group section ?
I am comparing this field in the AP- Vendor - Invoicing Tab , Is there a Simple work around in creating an Order entry screen that requires items the tax to be set up as tax included  ,or a product update on this ? thanks .