Retirement tax questions

Thank you for the information, much appreciated. I just wanted to mention, the commission I receive for the entire year is usually between $800-1000.  Very little. The only reason I continue with this business is because I get my vitamins paid using my commission.  I don't get them free for being in the business. I still have to pay for them so maintaining the business helps me pay for my vitamins.  I'm not profiting much but it's a passive income and it's something.  I think I will continue to file schedule C even if there are very minimal expenses.  I'm just concerned that the IRS will see that the income is very low so why do I even have expenses. I've been doing this for over 5 years now with very low commission because I don't want to sell anymore.