If you want to receive any child-related credits you have to file a tax return that shows you earned income from working, so of course you have to put your W-2 on a tax return. The child-related credits such as earned income credit, childcare credit or child tax credit are only available to parents who work to earn income--you do not get those credits just for having children. Are you claimed as anyone else's dependent? You have not mentioned your filing status--are you single or married? Will you be filing with your spouse? ALL of your income must be reported on your tax return.
Yes, you need to put your W-2 in the system for the Child Tax Credit to be calculated. The calculation of this credit takes into account your earned income as well as your Adjusted Gross Income.
For more information on the Child Tax Credit, check out this TurboTax FAQ: What is the Child Tax Credit?
There has been lots of hype in the news about the new $2000 Child Tax Credit. Unfortunately, some people do not yet understand that it does not mean they will automatically receive $2000 per child just for filing a tax return.
Do not assume your refund will include $2000 per child for child tax credits. It does not work that way. The CTC is used first to reduce your tax liability to zero. After that, there is a refundable portion —up to $1400 — called the Additional Child Tax Credit that is calculated based on the amount of income you earned. You do not necessarily get the maximum amount. You get 15% of the amount of income earned above $2500--UP to the maximum amount possible.
If your child turned 17 in 2019, even on the last day of 2019, you do not get the child tax credit. There are no exceptions to the rule. You can still claim your child as a dependent.
Your child must have a Social Security number to get the CTC.
If your child was born in 2019 you need to say the child lived with you for the WHOLE year.
If your child lived with you for less than half the year you cannot get CTC.
If you did not earn at least $2500 you cannot receive the child tax credit. Beyond that amount the CTC you receive is affected by your tax liability and the amount you earned. You might not get the full $2000 of CTC.