Chase Paymentech Solutions: Level II and Level III : Item-Level Fields

Item-Level Fields
 
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Y: amount is discounted
N: amount is not discounted
Y: item amount includes tax amount
N: item amount does not include tax amount
For ccAuthService, when you set this field to a value other than default or any of the values related to shipping or handling, the item_#_quantity, item_#_productName, and item_#_productSKU fields are required.
The item_#_taxAmount field is additive. For example, if you send one item with unitPrice of 10.00 and taxAmount of 0.80, and you send another item with unitPrice of 20.00 and taxAmount of 1.60, the total amount authorized will be for 32.40, not 30.00 with 2.40 of tax included. The item_#_taxAmount and the item_#_unitPrice must be in the same currency.