You need to enter your business income and expenses in the Self-employment income and expenses section in TurboTax. You will see an option for that under the Wages and Income option in the Federal section of the program. There you will see on option to enter information about your business, such as the name and address and product or service provided. There will be a section there for Income, in which you will choose Add Income for this Work and choose the Other self-employed income option to enter your income not reported on a 1099 form: