What can you do with a TEFL Certificate in the US?

I have just been admitted to a TEFL certificate course, and I was hoping it would allow me to teach English to children here in the US - but I was recently informed I would need a Masters degree to do that.

I am already working full time, and I don't have any plans to leave the US at this point. Has anyone had good luck with finding a job in the US with just a TEFL certificate? If so, what are my options?

This is a complete career change for me, so any advice would be great.

Thank you!