How we can use RowNumber() to get desired result

Hi

I have below query.

SELECT

A."DocNum",A."DocDate",A."CardCode",A."CardName",

A."StcCode", A."CGST",A."SGST",A."IGST",A."LocGSTN",A."BpGSTN",A."Total Amount"

from (

select

t0."DocNum",t0."DocDate",Max(t0."CardCode") As "CardCode",Max(t0."CardName") As "CardName",t2."StcCode",


(Select SUM(A0."TaxSum") from Inv4 A0 where A0."DocEntry" = T0."DocEntry" and A0."staType" = -100 and A0."StcCode" = t2."StcCode") as "CGST",

Max(T0."DocTotal"+T0."DpmAmnt") As "Total Amount"

from oinv t0

left join inv4 t2 on t2."DocEntry" = t0."DocEntry"

where t0."DocDate" >= '2014/12/01' AND  t0."DocDate" <= '2025/03/01'

group by t0."DocEntry",t0."DocNum",t0."DocDate",t2."StcCode",t0."CardCode",t0."ShipToCode"

I want data like below . If 1 Doc No has multiple rows then Grand Total should appear only once. How we can use RowNumber() in above query

Thanks