I think you are being downvoted because of the "you may be able to conceal the income" part. You don't want to do that specially when running an online business (which is never cash based). Everything has a trail and you need to try and manage all records correctly.

But yes, you have some ways to get some deductions for your business and write off a few things like meal expenses for client visit etc. But you cannot directly conceal income. That is almost a sure way of inviting the Tax Police/IRS.

At the end of the day, it is not so much about deductions for me. I still make less cash than my job (so far at least) even after deductions. It is more about the freedom of doing what I want to do.