Federal tax not being withheld HOH 1 dependent

This is my first year filing with this status HOH 1 dependent under 18. So far I’ve had this on my W4 for about a month and have not had any federal taxes taken out. I am wondering when I will start having the taxes taken out of my checks. I make around 36-38k a year, and I do not wanna get in a situation where I have to pay in come tax time. Any help would be appreciated!