My wife is not a salaried individual and has started trading. All these transactions are in STCG. Suppose if she makes 12L in a year, after deducting 2.5 L, do I need to pay tax on 9.5L as per tax slabs (considering the old tax regime) or do I need to pay 15% on 9.5L? There is no intraday or F&O. Do help me out.