The child-related credits like the refundable additional child tax credit and earned income credit are based on having income from working, so if you did not work, you will not be eligible for those credits. You need a minimum of $2500 from working to get even the smallest amount of the additional child tax credit. If you have some income from working, you might get some earned income credit.
https://ttlc.intuit.com/questions/1900923-what-is-the-child-tax-credit
https://ttlc.intuit.com/questions/1899157-what-are-the-qualifications-for-the-earned-income-credit-eic-or-eitc
https://www.irs.gov/credits-deductions/individuals/earned-income-tax-credit/use-the-eitc-assistant
Who has to file?
http://www.irs.gov/uac/Do-I-Need-to-File-a-Tax-Return%3F
UNEMPLOYMENT COMPENSATION
Unemployment compensation is taxable on your federal return.
You will have to enter a 1099G that is issued by your state.
Some states will mail out the 1099G. Or you might need to go to your state’s unemployment website and use the password, etc. that you have been using to certify for weekly benefits to get your 1099G from the state’s site.
Enter your 1099G in Federal>Wages & Income>Unemployment
Go through the screens very carefully, making sure to enter any federal/state tax you had withheld from the unemployment.
https://ttlc.intuit.com/community/entering-importing/help/where-do-i-report-a-1099-g-for-unemployment-or-paid-family-leave/00/26530
Most states with a state income tax do tax unemployment benefits
AL, CA, DC, NH, NJ, and PA do not tax unemployment
https://ttlc.intuit.com/community/personal-income-taxes/help/how-does-receiving-unemployment-affect-my-taxes/00/1756152
