First time self-employed

Hello,

This is the first time that I'll be filing as a self-employed/business owner individual. I'm a nanny, and I don't know how to file my taxes this year since I don't have any forms from a company, and the families don't do post-tax payments with me.

Do I need to sign up for a program to pay my quarterly taxes? What are the step-by-step instructions for quarterly and yearly tax filings?

 

Thank you, I'd appreciate all the help that I can get.