If you initialized payments and selected the Apply Discounts check box (in AR Initialize Receipt), this field defaults the offered tax discount amount (Disc Offered field), as long as the payment is applied before the Discount Date and covers the entire balance due of the invoice; otherwise, this field defaults as 0.00. Override this amount as necessary.
If you are applying payments manually, this field defaults the available tax discount amount (Avail Tax Disc field) as long as the transaction date is equal to or less than the invoice's discount date and the Total Applied amount fully covers the current due for the invoice. Otherwise, default will be 0.00.
If you override the default amount, specify any tax discount amount, as long as it does not exceed the available tax discount amount. To override this restriction, select the Remove Input Restrictions check box in AR Payment Detail.