Yes turnover should be different due to non filing of any invoices or due to not showing any zero rated supplies or due to mismatch of HSN code or showing exempt supplies as regular supplies etc.
Without filing how it accounted in gstr 9 and not accounted in AATO. There is the confusion araise. As per our data gstr 9 turn over greater than AATO. (simply one month turnover missing). how to rectify it.