Need help adjusting w4 on company intranet

Hi,

I need to adjust my W4 so I get less of a return and more on my checks.  So I did the IRS estimator, it gave me a number to put into step 3 for claim dependents.  Great, easy enough.  But when I go on my companies site to enter that number it only gives me one box to put that number and when I do I get an error that says "Dependent value must be divisible by $500.00".

 

So my question is, where do I get that number from?

 

Thanks in advance.