I made 16000 but have 3 kids would I get more money then claiming two?

Of course you would get more money if you claimed all 3 kids.

This question may have some hidden issues.

The OP may or may not get more money if he/she claims all three children, but there exists the possibility that the other parent (who may be divorced) could benefit MORE from claiming the extra child than the OP.

If this is the case, this option should be investigated. If both parents are in agreement and the support requirements via child support are met, it is perfectly legal.