If you are the only person claiming the kids and are single, then yes you can claim head of household. Depending on how much income you made will depend on the refund you will get back even though you only paid in $100.00 federal withholding tax. For example, I claim head of household, I have two children, made roughly $18,000.00 and did not pay any federal withholding. I got back close to $6000.00. Hope this helps.