He is absolutely shitting himself about the lifestyle he has led over the years and thinks he's going to be carted off to prison at any time.
We basically need to know if what he's done is BIG or BIGGER and what the implications are as far as tax goes. Would be very grateful for any advice.
When he was in his early 20s after Uni he made money but not in a way that you'd call a legit job
. He put savings away into a proper bank account over a space of about 3 years but was still claiming dole 
.
He then lived off handouts from my dad for the next 2 years, banked a little but stopped claiming dole for this period.
He went to work abroad in 2001 and for 3 years did so illegally as it was on a tourist visa. After the 3 years he got his current job, still abroad, but in a legit job, proper visa, etc. Throughout this time he has come home and banked his legit money as savings.
and that's it. He is very scared that his past will catch up with him if he ever came home and tried to get a job. He bitterly regrets being such a knob when he was younger. Is he right to be shitting himself? Thank you so much