Double check your 2018 and 2019 returns. As someone had stated earlier in this thread, the wording & methodology TurboTax used to ask questions about dependents may be poor. If you have more than 1 dependent under the age of 17 who lived with you, check your returns to make sure that the "Child Tax Credit" boxes are checked for the other dependents (assuming they meet all other criteria). The question posed by TurboTax was focused around how many months the child lived with you, so if you had a baby in December 2018 and selected 1 month then the software determined that they did not qualify for the Child Tax Credit where in fact they do. It appears the stimulus payments are going off of the same criteria thus they are using it to determine which dependents qualify for the $500.
None of this is advice but if you had a dependent who should have qualified for the Child Tax Credit, you can file a amended return. If you do, please make sure you double verify the information given to you as TT does not auto fill the dependent section on the 1040-X form.
