How to update when insert completed...

create Proc insert_Returns
@RID int output,
@ReturnsType int,
@CSPrefix varchar(50)
AS
begin
if not exists(select ReturnsType from tbl_ReturnSetings where RID=@RID)
begin 
INSERT [dbo].[tbl_ReturnSetings]
(
	[ReturnsType],
	[CSPrefix]
)
VALUES
(
	@ReturnsType,
	@CSPrefix
)
	SELECT @RID=SCOPE_IDENTITY();
	end
	else
	begin
	update tbl_ReturnSettings
	 SET	CSPrefix = @CSPrefix 
	where RID=@RID
end
end