This field in the Maintain Tax Codes (MTX) window is the period-to-date (PTD) and year-to-date (YTD) dollar value of non-taxable merchandise on:
credit memos
invoices with line item credits
Line Item Tax users (the Enhanced MTX Support field in Options Configuration is set to "Line Item Tax"): If this tax code is a line item tax code, this field will always be zero.
The Daily Journal Report (RDJ), Option F updates this field.
The Tax Report (RTX), Option P clears the PTD amount. Report RTX, Option Y clears the YTD amount.
This field is display only.