W4

Hi, I just started a new job and I am married, filing joint with one dependent. I filled my w4 out that way by checking box c. I did have a job before this one and did the same thing and had federal income tax withheld. This new employer however, is barely withholding any federal income tax. I make $20/hr 40 hrs a week and they are withholding $11 every two weeks. They said until I hit the $2000 for the dependent credit it will barely withhold any. That can’t be true right? Is this an employer error or does it make sense? Should I have done the multiple jobs worksheet with my w4? THANK YOU SO MUCH