The maximum Child Tax Credit is $2,000 per qualifying child. What two situations may limit taxpayers from receiving the full amount? 1. Modified AGI above the phaseout thresholds and three or more children. 2. Tax liability and modified AGI above the phaseout thresholds. 3. Earned income above the phaseout thresholds and taxpayer filing status. 4. Tax liability and earned income above the phaseout thresholds