A child can be a parent’s dependent if under age 24 and a full-time student who does not provide more than half of his/her support. A full-time student means the child is enrolled in school on a full-time basis for at least part of five months during the year. You must decide whether your son meets these tax requirements to be treated as your dependent.
Advance payment of current tax liability based either on wage withholdings or installment payments of your estimated tax liability. To avoid penalties, you generally must pay to the IRS either 90% of your final tax liability, or either 100% or 110% of the prior year’s tax liability, depending on your adjusted gross income.