First time with 1099

Hi, I just started doing contract work and need to start thinking about the whole quarterly payment issue. I am also a W2 employee at another job. I read if my estimated taxes are under $1000 for a year I don't need to file quarterly. But is that $1,000 just for the 1099 work? Or is it combined with any other W2 work you may have in that same tax year?

Also, does anyone know any affordable and easy way to pay and prepare/manage quarterly taxes online?