Extension of GSTR-3B filing deadline: electronic returns timeframe extended for eligible registered persons under GST law. Extension of time is granted for furnishing returns in FORM GSTR-3B electronically by registered persons whose principal place of business is in the State of Haryana. The Commissioner of State Tax, on Council recommendations, has specified new deadlines for monthly and quarterly return filings for the affected tax periods, applying to both monthly and proviso-based quarterly filing streams and limited to the class of registered persons identified by principal place of business within the State.