You must report all your income on your tax return. Since your total self-employment is less than $400,
@Carl is suggesting a simplified way to report the cam earnings. It would go as "other miscellaneous income" in Turbotax. The amount of tax due would be about 10% of the total amount you earned. The amount is small enough that you do not need to make an extra payment to the IRS now.
If you go back to the cam sites and start to earn more money so that your total is over $400, you must use the more complicated way to report the self-employment income. Keep track of your income and also any expenses you have to generate that income (such as commissions to pay to sites, or props that you buy, or your computer) as they MAY be able to reduce your taxable income. Your tax owed would then be about 25% or 30% (15% self employment tax plus 10% or 15% income tax.)
