Do you cheat on your income tax? How to do the research?

Do you cheat on your income tax? How to do the research?
One of the difficult part of research is getting honest and correct answers from the samples
specially in case the research is on sensitive issues involving criminality. When people are
directly asked if they are cheating on their income tax, they will rarely respond in positive. The
reasons of not accepting crimes include not being comfortable in accepting themselves as wrong
doers. The research can be...