Ok, long story short?
You need to turn this into a SQL view.
SELECT DISTINCTROW tblProducts.ProductID, tblProducts.ProductName, tblProducts.vatCatCd, tblProducts.dftPrc,
tblProducts.itemCd, 0 AS RRP, 0.16 AS VatRate, tblProducts.Sales, tblWarehouse.WHID, tblProducts.taxAmtTl
FROM tblProducts...