If you initialized payments and selected the Include Retainage check box (in AR Initialize Receipt), this field defaults the unpaid retainage amount (if any), as long as the payment is sufficient to cover both the unpaid retainage and total amount due (invoice amount, tax, and finance charges, if applicable). Otherwise, this field defaults as 0.00. Override the amount as necessary.
If manually applying payments, or if overriding the default-applied retainage, specify any amount of the payment to apply to retainage, as long as it does not exceed the amount in the UnPaid Retainage field. To override this restriction, select the Remove Input Restrictions check box in AR Payment Detail.