How can I get the child tax credit from 2023 (last year)? I show I did not get it for some reason. I made enough money to file.

If you made a mistake on your 2023 return that prevented you from getting the CTC you will need to amend 2023.  You cannot enter anything on a 2024 tax return to get the CTC for last year.

"I made enough money to file"------but did you make enough to get the refundable additional child tax credit for  2023?  

Make sure you entered your child as a dependent in My Info, and that you entered the child's Social Security number.    Careful— do not say that your child’s SSN is not valid for employment.  If your child was born in 2023 make sure you said he lived with you the whole year.  There is an oddly worded question that asks if the child paid over half their own support.  Say NO to that question.

Did you enter income from working in 2023?  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 $1600 for 2023.  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 $1600 per child. If the amount you earned was too low, you will not get the full $1600.

 If your child' s older than 16 at the end of 2023, 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 2023 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

See this TurboTax support FAQ for amending a tax return - https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-return/amend-change-correct-return-a...

Do not expect quick results from amending. It can take four months or more for the IRS to process an amended return.  

You can watch for information here:

https://www.irs.gov/Filing/Individuals/Amended-Returns-(Form-1040-X)/Wheres-My-Amended-Return-1