If Case in Report Studio

Hello Everyone , Im trying to create similiar case / statement to check PO Status in Report Studio . However , The syntax doesnt work for some reason .
Is there any way we can include this query in report studio ?

if [COMPONENT_BRANCH] = [BRANCH] then
if (([ORDER_QTY] - [ISSUED_QTY] - (
if([ON_HAND] is null) then
0 else
[ON_HAND])))
<= 0 then
“Available”

                    if [PO_WO_DATE] > [WO_START_DATE] then
                       "DELAY"
                    else
                        "On Track"
    else "Check Branch"