How do i know if my child was claimed on my w4

[VolvoGirl]

What you claim on your W4 at work doesn't have to match your actual tax return.  On your W4 you claim Allowances.  

[bluedeb]

A W-4 is a Employee’s Withholding Allowance Certificate, it informs your employer of how much money to withhold from your paycheck for federal income taxes. You enter how many allowances you want on your W4, the allowances determines how much taxes are taken out of your paycheck.  Less allowances has more taxes taken out of each pay check, more allowances has less taxes taken out of each paycheck.

The number of allowances on a W4, does not have to much how many dependents you claim on your tax return.