Professional Crossed 20 Laks in Dec 26 Failed to Take GST in 30 Days Taken GST in May 26

No. You cannot report the turnover of Dec-2025 to Mar-2026 in June-2026. GST is payable for the period in which the taxable supplies were actually made. If you crossed the threshold in Dec-2025, you should have applied for registration within the prescribed time, and the tax liability generally relates back to the effective date of registration/liability, subject to the registration order. The turnover of ₹7,63,800 should be considered for the relevant period itself. If GST was not collected from customers, it may have to be paid by you along with applicable interest and other consequences for delayed registration/compliance.

Thank You fro your reply sir ,

sir company  give gst reimbursement while filing the GSTR - 1 and GSTR -3B only thery are ready to pay the GST if we file the details in June 26  GSTR -1 & GSTR -3B for Jan 26 to March 26  with Invoice Dated 30.06.26