New GST registration for businesses, freelancers, and e-commerce sellers. State-wise and multi-state GST advisory

Monthly / Quarterly returns — GSTR-1, GSTR-3B. Annual return filing (GSTR-9, GSTR-9C). Auto-reconciliation with GSTR-2A/2B data

Filing NIL returns for inactive businesses to avoid penalties

Amendment of GST registration details. Correction of invoice mismatch and return errors. Response to GST departmental notices

Advisory on eligible vs. ineligible ITC. ITC mismatch resolution with vendor communication. Preventing GST credit reversals