You have syntax error
SELECT
StockReqTemp.SRT_ID
, StockReqTemp.SRT_Descr
, StockReqTemp.SRT_Qty
, StockReqTemp.SRT_Unit
, StockReqTemp.SRT_Conv
, StockReqTemp.SRT_Price
, ( StockReqTemp.SRT_Qty * SRT_Price ) AS SRT_TAmt
, StockReqTemp.SRT_ServedQty
, ItemMasterlistTable.Item_Balance
FROM StockReqTemp
INNER JOIN ItemMasterlistTable ON StockReqTemp.SRT_ID = ItemMasterlistTable.Item_ID