This field defaults the ‘unpaid tax’ amount for the invoice (initialized or manually applied payments) or the amount of the payment, whichever is greater. For example, if the payment amount is $1000.00, but the Current Due is $25,000.00 and the UnPaid Tax is $1,500.00, this field will default 1000.00. You can override this as necessary.
If you override the default amount, specify any amount of the payment to apply towards the tax amount, as long as it does not exceed the amount in the Unpaid Tax field. To override this restriction, select the Remove Input Restrictions check box in AR Payment Detail.