Good question. Many who have F&O income less than 6% of Turnover would like to club STCG if possible and be able to put the sum under presumptive taxation.
Tax audit is not applicable for turnover up to ₹10 crore provided that the total cash payments/receipts do not 5% of the total cash payments/receipts.
*Tax Audit is applicable if your total Income exceeds the basic exemption limit and you have not followed the rules of the presumptive tax scheme u/s 44AD
Also, STCG on debt mutual funds will be taxable under capital gains at slab rate.