Create FUNCTION TO find TAX in sqlserver

CREATE FUNCTION F_Get_IncommTaxx(@sal money) -- 2500000 RETURNS money -- SELECT DBO.F_Get_IncommTaxx(300000) AS BEGIN       DECLARE @R_sal MONEY=@sal-150000 -- 350000       DECLARE @tax MONEY =0        IF(@R_sal>0 AND @R_sal<=100000)        BEGIN             SET @tax=(@R_sal *10)/100             SET @R_sal=@R_sal-100000        END        ELSE IF(@R_SAL>0)        BEGIN             SET @tax=(100000 *10)/100 -- 10000             set @R_sal=@R_sal-100000  -- 250000        END        -- 20% slab        if(@R_sal>0 AND @R_sal<=200000)        BEGIN             SET @tax=@tax+((@R_sal *20)/100)             SET @R_sal=@R_sal-200000        END        ELSE IF(@R_SAL>0)        BEGIN             SET @tax=@tax+((200000 *20)/100) -- 50000             SET @R_sal=@R_sal-200000          END                -- 30% slab        IF(@R_sal>0 )        BEGIN             SET @tax=@tax+((@R_sal *30)/100) -- 65500        END                      RETURN @tax; END