Self-Employment tax.
Go through your journal and figure out which part of your income was from notary acts and which was from travel fees and siging agent fees. If a signing paid $60 and you did five notarizations in California. The notary fee part of you work could legally be considered $50. The notary part of your income is NOT subject to self-employment tax. You can make two schedule C's: one for travel fees and its associated deductions (mileage deductions among others), and one for notarizations with its associated deductions ( perhaps part of our advertising costs ). This is complicated, so document your work, and the IRS was a pain in the neck when I did this wrong, but when I used two C's and documented my business and proved that I'm following the crazy laws that THEY created, they accepted it.