Penalty for GST offences: fines or tax-equivalent penalties apply for invoice fraud, non-remittance, misuse of input tax credit and fraudulent refunds. Section 122 imposes monetary penalties for specified GST contraventions including issuance of false or fictitious invoices, billing without supply, non-remittance of collected tax beyond three months, failure to deduct or collect tax as required, wrongful availment or distribution of input tax credit, fraudulent refund claims, falsification of records, failure to register or maintain books, suppression of turnover, obstruction of officers, transport without required documents, and tampering with detained goods. Penalties are the higher of a baseline sum or amounts tied to the tax evaded or improperly dealt with; higher sanctions apply for fraud or wilful misstatement, and aiding, abetting or dealing in prohibited goods can attract enhanced penalties.