How many allowances to claim on a second job? How to avoid paying too much or too little?

[caseyrose]

I have tried to do the worksheets, I have tried the withholding calculator. I just don't understand any of it and I don't know how much to claim. I don't want to pay too much or too little and get in trouble when I file my next return. Can anyone please help me out? Each job is only a part-time job, with my second job getting barely 10 hours a week, with a couple of exceptions. I just don't know what to do and I am kind of freaking out. 

[Country Apple]

Without knowing more details of your particular situation, I would suggest claiming Single-Zero on your W4 so you have some tax withheld but not too much.