You do not put your nanny down on a Schedule C as a business expense--if that is what you are suggesting.
But if you paid someone to take care of your child so that you could work, you can enter the childcare credit.
Federal>Deductions and Credits>You and Your Family>Child and Dependent Care Credit
https://ttlc.intuit.com/questions/1900643-what-is-the-child-and-dependent-care-credit