Turnover exceeding 1.5 cr

If your business turnover exceeds £1.5 crore, your GSTR1 filing frequency may need to change from quarterly to monthly. This change isn't automatic; you generally cannot switch mid-financial year. You'll typically need to wait until the start of the new financial year in April to opt for monthly filings. It's advisable to confirm the exact process and timing with the GSTN help desk, especially as estimating turnover can be uncertain.