My dependent is 16 years old but I didn't get the full $2000 child credit. Why not? I got a $500 additional credit but the standard deduction for my dependent.

Check the date of birth you entered in MY INFO.  You cannot get the child tax credit for a child who was older than 16 at the end of 2024.

Did you enter a Social Security number?   Did you say the SSN is valid for employment?

When it asked if she paid for over half her own support did you say NO?

Have you entered income from working in 2024?  If not,  you will not receive an income tax refund based on having dependent children.

  The maximum amount of the child tax credit is now $2000 per child; the refundable “additional child tax credit” amount is $1700.   In order to get that credit, you have to have income from working.  The credit is calculated based on the amount you earned above $2500 multiplied by 15%, up to the full $1700 per child. If the amount you earned was too low, you will not get the full $1700.

 If your child is older than 16 at the end of 2024, you do not get the CTC.  But you may still get the non-refundable $500 credit for other dependents instead.

https://ttlc.intuit.com/questions/1900923-what-is-the-child-tax-credit

https://ttlc.intuit.com/turbotax-support/en-us/help-article/taxation/additional-child-tax-credit/L6xFeMFEf_US_en_US?uid=lqnuygah

https://www.irs.gov/help/ita/does-my-childdependent-qualify-for-the-child-tax-credit-or-the-credit-for-other-dependents

Look at your 2024 Form 1040 to see the child-related credits you received

PREVIEW 1040

https://ttlc.intuit.com/questions/1901539-how-do-i-preview-my-turbotax-online-return-before-filing

Child Tax Credit line 19

Credit for Other Dependents line 19

Earned Income Credit line 27

Additional Child Tax Credit line 28