This value is the total amount of sales tax for the order line item for the corresponding impositiion (tax type).
TaxAmount = TaxOnSubtotalAmount + TaxOnShippingAmount + TaxOnHandlingAmount
Note: If the corresponding tax type is
SalesTax (if found under both the eBayCollectAndRemitTaxes.TaxDetails and Taxes.TaxDetails containers), the order is subject to 'eBay Collect and Remit' tax, and a change in logic has been rolled out as of early November 2019. For orders that are subject to 'eBay Collect and Remit' tax, which includes US sales tax for numerous states, and 'Good and Services' tax that is applicable to Australian and New Zealand sellers, the tax amount in this field will be included in the Order.Total, Order.AmountPaid, and Transaction.AmountPaid fields.
Sellers should be aware that the sales tax that the buyer pays for the order will initially be included when the order funds are distributed to their PayPal account, but that PayPal will pull out the sales tax amount shortly after the payment clears, and will distribute the sales tax to the appropriate taxing authority. Previous to this change, PayPal would strip out the 'Collect and Remit' tax before distributing order funds to the seller's account.
This logic change does not apply to sellers who are in eBay managed payments, so the amount in this field will never reflect any 'Collect and Remit' tax, even if the order is subject to 'Collect and Remit' tax.
See the Field Index
to learn which calls use TaxAmount.