Canada Tax Questions Answered by Experts
In most cases the audit cannot go back more than 4 years.
And in fact records do not have to be kept for more than 6 years in most cases.
So an audit would not be done for those years.
If you make a voluntary disclosure there would not be penalties.
There would be interest unfortunately.
There is solicitor client privilege at all times between a lawyer and a client.
There is not the same privilege with an accountant.
So if you need this then see a tax lawyer.