Commonwealth Consolidated Acts(1) If the Commissioner has reason to suspect that:
(a) a person (the person liable ) has become liable under a remittance provision to pay an amount to the Commissioner; and
(b) the liability to pay that amount remains undischarged after the due date;
the Commissioner may make what he or she thinks is a reasonable estimate of the unpaid amount of that liability.
(2) In making the estimate, the Commissioner may have regard to anything he or she thinks relevant, for example, information about:
(a) amounts deducted; or
(b) amounts withheld from payments; or
(c) payments received; or
(d) non‑cash benefits provided;
during a period earlier than the period in relation to which the liability arose.