They will search public records for evidence of additional unreported income, taxassessor and real estate records for assets held by the non-filer, and records of professional associations and business license bureaus for information on businesses being operated by the non-filer.
What follows is a revised version of a letter I wrote for our County TaxAssessor early last year with the addition of links to a couple of articles in which Mike Hammock and I summarize some of the research on education monopolies and a few other light edits.