You enter Business Income in Schedule C. You might have received 1099's from some other businesses you did work for. The TurboTax step by step "Wizard" will ask you if you received 1099s and will have you enter the information to each one in the program. If you made additional amounts from your business it will have you enter those in also . It will all land in the correct spots on the forms if you follow the steps.
An example might be you did 100k in business. You received 20k of which the purchasers of your services or goods sent you 1099s which you will report. The other 80k of "cash" receipts will go in the other income spot.
And all the other deductions will have to be entered also as you work through the program.
It's very logical but tedious in spots.
Keep your coffee on, It might be a long night or two.
