I am sorry - I was addressing the situation he was suggesting - meaning, taking on some part-time, bit jobs.
I will restate. As a sole practitioner, working out of my house, writing, consulting, or even working on someone's computer, I am not required to have a business license in most cities.
However, should I start driving traffic to my home - assuming I have gone outside the stipulations of a home-owners organization or the city I live in, no license is required.
Or to be more specific. I don't need a business license to write an aricle or to log into a remote client (or drive there and meet with them and perform work).
If I setup a brick and mortor shop, the city will usually require a business license. If I have clients meet in my home, I will probably require a license. If I resell I will need a reseller permit and tax ID.
However, when it comes to taxes - if your work is substantial, you will want to setup a more definable businesss in both locale (even if out of your house) and in licensing. Otherwise, the IRS and state revenue departments get "funny" about deductions.
That just didn't seem to be the case in his circumstances.
Matthew Moran