44AD Income

If a person has turnover of ₹ 1,20,00,000/- in 2017-2018 and has shown income u/s 44AD. In 2018-19, he has a turnover of ₹ 1,80,00,000/- and shown income as per audited accounts. In 2019-20, he has turnover of ₹ 80,00,000/-.

Now my question is that whether in 2019-20 he has to audit his account or he can show his income as normal business income