A taxpayer must keep records that will enable him to make a true tax return. This means – a cash receipts book, a cheque payments book, a sales book, a purchases book, a register of assets and liabilities, and a record of asset acquisitions and disposals (s 886). Records may be stored electronically (s 887).

A Revenue inspector may inspect PAYE records (s 903), relevant contracts tax records (s 904), and general business records (s 905).

He may be accompanied by a member of An Garda Síochána (s 906).

He may require a financial institution to provide copies of bank statements (s 908).

He may require you to submit a statement of affairs (s 909).

He may check a third party return of information or payments made (s 899).

Revenue may take criminal proceedings against a taxpayer who deliberately and defiantly refuse to comply with tax laws by failing to pay tax or file returns (s 1078).