Explanation
CBIC Notification No. 38/2023–Central Tax (dated 4 August 2023) introduced Rule 88D to the CGST Rules 2017. Rule 88D: where the ITC availed by a registered person in GSTR-3B exceeds the ITC available in GSTR-2B by such percentage as may be prescribed, the portal auto-generates DRC-01C. Reply (DRC-01C Part B) must be filed within 7 days explaining the excess ITC or paying the difference via DRC-03. Failure to reply blocks next period's GSTR-1. This rule was a response to fake ITC claims. Verify on cbic-gst.gov.in.