,ROUND([COST_LABOUR_FW] + [COST_PARTS_FW] + [CVR_FEE_FW] + [TOTAL_TAX_FW],2) as FW_COST_TOTAL
... and if it fails, copy-paste in this question the entire query, and the error message
,ROUND([COST_LABOUR_FW] + [COST_PARTS_FW] + [CVR_FEE_FW] + [TOTAL_TAX_FW],2) as FW_COST_TOTAL
Show us the T-SQL that does this, and what is the data type (float, numeric, etc.) of this column?
>I want to round the alias "FW_TOTAL_COST" to 2 decimal places...
I don't see the column FW_TOTAL_COST anywhere in the above T-SQL block, (FW_COST_TOTAL, same thing?), so show us that too.