Tax evasion offences carry graded imprisonment and fines, with certain invoicing and credit abuses designated non-bailable. The provision enumerates offences such as false or absent invoicing, misuse of invoices to claim input tax credit or refunds, failure to remit collected tax, falsification of records, obstruction, dealing in confiscatable goods or prohibited supplies, tampering with evidence, and supplying false or withheld information; treats tax, wrongly availed credit and wrong refunds as taxable amounts for culpability; prescribes graded imprisonment and fines based on taxable thresholds with minimum terms for imprisonment absent recorded reasons; makes most offences non-cognizable and bailable except specified invoicing, credit misuse and non-remittance offences which are cognizable and non-bailable; and requires prior sanction of the Commissioner for prosecution.