An analysis of Mr Antonopoulos's financial records showed that the restaurant's gross profits were low when compared to other similar businesses.
"Benchmarking the performance of businesses within the same sector enables Inland Revenue to identify taxpayers likely to be suppressing income," Mr Morris said.
"Once identified, Inland Revenue has a number of techniques and tools at its disposal to verify whether cash sales have been omitted and to quantify that omission."
Inland Revenue has recovered $361,000 from Antonopoulos while just over $88,600 remains outstanding.
La Casa Pasta, which has been serving up cheap pasta on Dixon St for many decades, has been sold and is under new management.