The tax professional who did my taxes last year did that, so the IRS could see exactly what my Office Expenses, Advertising expenses, etc. consisted of. I was thinking it might help answer questions that could trigger an audit. Of course the opposite could also happen if some of the itemized expenses raise questions that might not have otherwise existed. How common is it for sole proprietors to itemize their Schedule C Part II Expenses on separate sheets of paper, and is it a good idea to do this?
