Get your taxes done using TurboTax

NO ... stop worrying about this ... your kid will not have an issue if their income is below the filing requirement.  However you do have the option to add dependents or deductions on the new W-4 form to have less withheld like we used to doctor the old forms by adding exemptions.  OR  do nothing and just get any excess withheld on the tax return which is not really then end of the world.